Sea Ice Guide
This guide details how to survive in the most hostile environment in the RimWorld planet - sea ice.
Introduction[edit]
The sea ice biome is one of the coldest biomes in the game, with only orbit
being colder. There is almost no animal life and no plants. In fact, you shouldn't expect to find anything more than a few snowhares in your start, perhaps an arctic fox or polar bear if you're lucky.
There is also a complete lack of soil, ruins, geothermal vents, stone, or ore. Moisture pumps will generate ice and deep drills do not function. All these combined will make developing very slow and tedious. It will be harsh before you get a heater and a hydroponics basin, then you can plant something indoors. It will still be harsh after that too. You'll have to rely on trading, quests, random events and eventually the long-range mineral scanner to get any other materials with which to build a base.
Even on the warmest sea ice tiles, it's still really cold. The average varies from -20 °C (-4 °F) to -30 °C (-22 °F) and they never have growing periods due to the temperature. If you chose a warmer landing spot, you still need to eventually make a freezer though, because the summer temperature can be hot enough to spoil your food. Expect to have problems with hypothermia during fall, winter, spring and during cold snaps in summers.
They are particularly bad for travel by caravan. They do not have roads and are always placed in the poles of the world, so they have a big penalty to caravan speed due to winter, which is most of if not the whole year.
It's a deserted, cold, hell.
In order to conquer it, we'll analyze the basics necessary to survive in these conditions and then, what is needed to thrive in it into the endgame. There will be suggestions that branch off from the fundamentals for specific playstyles.
Immediate Survival[edit]
Colonists have needs, without the which they get a mental break or die. Sea ice does very little to help here, which makes the biome so challenging. These can be summarized into:
- Food: Without nutrition, your people will die.
- Temperature: If your colonist is too hot or too cold, they will die.
- Mood: The final purpose of recreation, beauty, certain moodlets etc; is all to provide a boost to this stat. Keeping this stat up is required for keeping your pawns in a useful, sane, state.
Each of these topics will be covered in their own subsection.
Food[edit]
The most reliable food source is hydroponics, but this requires research, stable heat, lots of electricity, and resources (
100 Steel,
1 Component per basin).
When starting out, colonies can use their starting resources, the initial animals, and trading, but all of these will run out eventually. The two reliable sources of early game food are:
- Cannibalism: The storyteller will send raids and events at the normal rate, even in the brutal sea ice. This is particularly sustainable with a single colonist; not only are there less mouths to feed, but the storyteller will constantly generate new recruit events due to PopulationIntent, which can be converted into human meat.
- Fishing
: Provided there is a large body of water, your colonists can survive the temperature, and fishing is researched, fishing can be a potentially year-round source of food.
- By creating a room with water inside it, it is possible to fish year-round, in a temperature-controlled environment. This can be done by enclosing the body of water, or building a small room on top of it (place bridges, make a room on top of the bridges, have a gap of water inside said room, then heat up the room. This allows access to the full lake's worth of fish, even if most of the lake is frozen).
Temperature[edit]
New Arrivals can easily build a heater, although they will need warm clothing for when the electricity goes out. New Tribes can build a campfire for the early game, and should eventually get enough warm clothing to not require heat.
Any pawn that arrives in your map (allied or enemy) will typically wear parkas and other warm clothing. Enough sufficient-quality clothing should let colonists survive the cold with no external heating.
The most heat-efficient shape is a square, as rooms loose heat from their edges, and a square has the best area-to-edge ratio. Double-thick walls have twice the insulation as single-walled ones, and rooms adjacent to each other exchange heat, which makes "huddling" all of your rooms together around a central warm room, efficient. You can further make these rooms double-thick as well to give even more heat insulation from the cold outside for the rooms deeper in the base.
As raids bust into your base, as soon as your rooms aren't fully enclosed anymore, they are immediately considered "outside" and default to the ambient temperature. This can immediately kill your precious hydroponic rice.
Mood[edit]
This can usually be covered by picking colonist(s) with a helpful mood trait, and/or creating a strong ideoligion
. Traits such as Iron-willed, Steadfast, Sanguine and Optimist are broadly useful.
Because human meat is one of the few readily available sources of food, bloodlust, cannibal, and psychopath, and/or their respective precepts
(Cannibalism: Acceptable, Organ Use: Acceptable, and Corpses: Don't Care) are especially helpful. The starting xenotype
can be modified to increase mood, cold tolerance, and decrease food consumption.
If a colonist does have a mental break, you can:
- Arrest them: You can release them immediately afterwards. It won't give them the benefit of Catharsis, but it will end the mental break.
- Beat them up: It will end the break, give them Catharsis, but they'll need to spend time recovering. Luckily, with so little to do on Sea Ice, colonist downtime is often much less of a problem here than on other biomes.
- Tank through it: Someone going on a drug binge is not much of a deal when you'd likely have barely any, for example.
Parties, marriage, and successful rituals
can be a good chance to do mood-hindering tasks like butchering humans.
Growth[edit]
After food, temperature, and mood are stabilized, sea ice gameplay becomes slow and potentially tedious, but the gameplay is not itself difficult - it just requires a lot of waiting. It can be a bit more challenging: more can go wrong, it can be harder to recover if something breaks, and playing with a solo colonist always comes with added risk.
Steel and Components[edit]
The basic design of the game requires steel and components to advance your colony, which do not generate in the sea ice. This means you'll need to resort to trade to acquire them, and/or use the smelter on raider weapons to gather the steel you need to advance. While you might get some lucky amounts of steel and components through raider loot and events, a coarse, general route for progressing in sea ice is:
- Budgeting and making use of the materials from your starting scenario: You won't get more for a very long time. What you start with is what you have. I suggest that you use a spreadsheet to plan out what exactly you will be spending your precious wood and steel on.
- For Crashlanded and other similarly advanced starts, I strongly recommend to set aside enough steel for a smelter, a sun lamp, a few hydroponics, a comms console and orbital trade beacon, which leaves very little left over steel. Remember that you can also smelt down your initial gear, like the flak vest you start with. The budgeting you will need to do might be extreme.
- Smelter: The smelter is a free, sustainable source of steel, turning raider gear and chunks from the sky into usable metal.
- Mechanoids: Once your colony is advanced enough to encounter mechanoids, they can be dismantled at a machining table or crafting spot. A mechanitor
can also call boss raids for steel. - Trading / comms console: With a comms console, orbital trade with bulk traders can provide an enormous amount of stone, steel, components, etc., if you have something to buy them with (eg. lungs, hearts, etc). Trading through caravan is also possible if a settlement is nearby, although steel is very heavy.
- Long-range mineral scanner: A great and infinite source of resources in the late-game, including steel and components. Pack animals, drop pods, or passenger shuttles
can be used to transport colonists and items both ways. Multiple scanners can be built to find resources faster.
Late game challenges[edit]
During the late game, after a trading network and/or a long-range mineral scanner is established, gameplay will start feeling like any other biome. A "death spiral" or a colony-collapsing raid remains difficult to salvage, but the temperature and events like solar flares should no longer be an issue.
One thing to note is that, once the colony has progressed to the point that mechanoids are allowed to spawn as raiders, and it is below -40 °C (-40 °F), only mechanoids will raid the colony.
Starting the Game[edit]
Landing site[edit]
Sea Ice tiles do not have roads or rivers, neither does the ice sheet which is always next to you. Without Odyssey, the only factors to consider are the temperature, proximity to neutral settlements, and the presence of a coast. With Odyssey,
the size of lakes/coastlines for fishing will matter, as will landmarks (ice dunes can allow an ancient danger to generate).
Select the temperature range you want: Either the lowest possible, or one that reaches positive temperatures in the summer. Both have their advantages:
- If the temperature reaches positive, trade caravans are allowed to arrive, human raids will occur even in the late game, and fishing
outside is easier. You will not be able to freeze food outside all year around. - If the temperatures are very low, you can freeze your food outside around the year, and might even be able to build an indoor freezer without a cooler. The low temperature might kill early game raiders before they can attack your base. However, once you reach the necessary wealth, most raids will be mechanoids, so cannibalism will no longer work. You will still be able to fish, but this requires roofing and heating the water tiles.
If you wish to send trade caravans, choose a tile with friendly faction bases nearby. Lack of mountains nearby will make it easier to caravan to trading spots and eventually long-range mineral scanner sites.
Starting colonists[edit]
Aside from picking traits and xenotypes
that provide a more direct boost to the fundamentals of mood, food, and temperature, there is more to consider to starting colonists:
Skills[edit]
While a lot of skills can find a place in a Sea Ice colony, there are certain ones that are more helpful than others for the pawns that you will have at the very start.
- Animals: This skill helps with fishing
, making it immediately useful for Tribal starts, and eventually useful for other starts. Without Odyssey, this skill is terrible as there won't be enough food to sustain animals in the early game. - Artistic: Terrible. There are hardly any materials to work with, until much later on.
- Construction: Crucial. Especially during the first day, it's very useful to have someone that can build your initial base to stay warm while having the least amount of botches that will waste your precious initial materials.
- Cooking: Important for tribals because of their reliance on meals, not very useful for advanced starts as the nutrient paste dispenser gives a higher ingredient-to-food ratio.
- Crafting: Not very important at the immediate start, similar to Artistic, due to the lack of resources. It can help craft a parka or two, but you can just trade for those items, or stay inside. It can also turn human leather into more profitable clothing, but selling livers, kidneys and lungs should be enough profit, and human leather armchairs are reasonable alternatives.
- Medical: Very good or crucial. Not only does it help tend to injuries and disease, making it critical for solo colonies, this skill is a great way to pull organs for money.
- Melee: Good to have but not necessarily important. Ice terrain has a 48% movement multiplier, and with the complete lack of natural cover (and artificial cover being expensive as all resources are precious on Sea Ice), gap-closing is difficult vs enemy ranged fire.
- Mining: Terrible. Unless you're banking on an extremely unlikely steel meteorite event to bless your earlygame to get you going, there is just nothing to mine on Sea Ice.
- Intellectual: Most of what you'll be doing is research, so a passion can help for mood boost and speed. A high starting intellectual skill is not necessary, although it can help get crucial technologies like hydroponics basin faster.
- Plants: Good eventually, because of how important hydroponics are. If planning on sustaining a long time with cannibalism or fishing, this skill is not important right away.
- Shooting: Very good and far superior to melee. The complete lack of cover and living on the slowest natural terrain in the game favors ranged combat.
- Social: Very good, because of heavy reliance on trading, and the ability to use it to immediately end mental breaks by arresting and then immediately releasing the colonist that is undergoing it.
Scenario-specific advice[edit]
- (Tribal) You can't feed five people; neither can you put them to sleep in cryptosleep -- and people are the only thing you have that is worth something. So, since you can only feed 1-2 people, you have to sell the other three. You won't use them in the beginning, but you might still meet them later on quests.
- (Crashlanded) You have enough packaged survival meals to endure until you get hydroponics basins researched (if you research battery then hydroponics). If you have a nutrient paste dispenser, one hydroponics basin produces enough food for one colonist, so it's not compulsory to sacrifice or cannibalize any of your starting three.
- (Rich Explorer & Mechanitor
) More advanced and with less mouths to feed than Crashlanded, they can reach stability fairly easily.
Ideoligion[edit]
| This article relates to content added by Ideology (DLC). Please note that it will not be present without the DLC enabled. |
Allowing cannibalism is obviously very helpful, although if the ideolgion is not fluid, avoid setting cannibalism beyond acceptable (as mechs will be common late game). General mood-enhancers like biogtry and Corpses: Don't Care will help as well.
Rituals are a game changer - it is easiest to start with 6 rituals able to be done at any time, and have them provide random recruits or ancient complexes. The random recruit reward will create a pawn, who will come with warm clothing, some meals, and can be used for human meat. Setting tailcap as desired apparel is a further benefit as the recruits will all come with tailcaps. Ancient complexes are a building that can be used for shelter and resources. Rituals can make even Naked Brutality a possibiltiy.
Base planning[edit]
Because of how scarce and precious materials are on Sea Ice, it's recommended to plan your base right from the beginning, especially your starting one. Besides what you get from your initial scenario and the few bits of initial wildlife, the map itself provides no resources outside of events, such as raids for precious human meat and human leather.
The whole map is empty, save for a few water pools. The good news is that you can place your base right in the middle and make it very symmetrical, if that's of your fancy. Regardless, remember that it will take a really long time to get the materials to make your base, so you'll likely live in just one of your planned rooms for a very long time.
For your initial base, remember that you can use the silver you start with for walls as steel and wood is extremely precious, and that you don't have to fill in corners.
Because of temperature mechanics, it's important to consider that a square is the most temperature-efficient shape (the least heat loss per tile) and that you should make the warmest rooms closest to the general center of your base so that the outer rooms adjacent from it can "leech" off the heat that radiates off of it rather than it being lost to the fixed outside temperature. Additionally, double walls give double insulation against the cold.
Tribal Playthrough, no DLC[edit]
First agenda[edit]
- Make your starter base with wood. Give people a place to sleep, eat and play.
- Whenever you refuel campfires, either for cooking or heating up, make sure to disable refueling so they don't refuel it unnecessarily. Forbidding any wood that is not currently being used will help prevent any mistakes.
- Hunt those snowhares before they leave the map.
- If close to a settlement, arrest your three merchandise colonists.
- Sell your merchandise colonists and your starting animals.
- Buy your survival items with the silver you got from selling your people and animals.
- Make lightleather bedrolls.
- Make your research bench and start researching complex clothing.
Hunt the bunnies, make a room to arrest people, then go sell them.
Go and visit your nearby friendly base to trade your merchandise colonists, your animals and some useless weapons. You should get somewhere between 1500 and 2000 silver for three colonists and three animals in addition to your starting 200 silver.
Now you have to buy some food, clothes and materials. Since you can't carry all the materials you need, you need to come back to trade many times. Food should be the cheapest option available. Nutrient paste meals, insect meat, human meat and vegetables are the best options. Meat is more expensive but it's better to cook that than buy fancy meals.
Clothes are just a little insulation to save you in the first season, the cheapest tuque is enough. After that, you need to either make your own clothes or strip clothes from raiders, even if they are tainted.
You need at least 25 steel to make your research bench and some wood to use for cooking. Try to build two research benches if you can, otherwise your other colonist will often be idle. Later, you will need more materials to actually build a base. First you want wood and steel because they are lighter, but later you want stone blocks, which are cheaper and do not catch fire.
BONUS: Buy a muffalo[edit]
You need to keep one colonist at base researching, so trading will be really inefficient with just one colonist to carry stuff. There is one solution before electricity: a muffalo.
It will more than triple your carry capacity and eventually give you wool. Unfortunately, there is no guarantee that a faction base will have a muffalo for sale, unless you keep reloading before you trade until they have it. If you don't want to do this, you can keep three colonists with you and use two colonists for trading instead. But remember, a colonist eats more and carry less than a muffalo, so it's going to slow down your progress.
Second agenda[edit]
- Keep trading to get food whenever needed.
- Keep trading to get materials to make a base.
- Harvest and sell the organs of anyone you capture alive.
- Butcher and eat the meat of any dead bodies you get.
- Make human leather bedrolls.
- Make and sell human leather tribalwears.
- Wear their tainted parkas and tuques if you've got nothing better.
Notes[edit]
The first raid should arrive by the end of the first week. Try to have a colonist with a gun or both together in your base when that happens, because you do not have any defenses yet.
Now the fun starts. You will harvest the organs, eat the meat and wear the skin of your enemies. If anyone tries to join your colony, you will sell or harvest them too because you can't currently afford more people. People who you will harvest include:
- Any raider that shows up.
- Any wanderer that decides to join.
- Any survivor who arrive in a escape pod.
- Any refugee who asks for help. Also the raiders following them.
By butchering your enemies you will get food and leather, which you can make into tribalwears and sell, but that won't be enough. Everything you get is through trading, so you should also harvest and sell the organs of anyone you capture alive before eating them. It's worth buying medicine just for that. You don't need to do this every time, but it gets you a lot of money and will greatly speed up your colony building.
BONUS: Summon Man In Black[edit]
Getting the Man In Black to show up when you have so few people is really easy. Just set their 'Food Restriction' to 'Nothing' and wait until people collapse. Then use him to bring people back up.
The Man in Black comes with good gear. You should strip his gear and sell him into slavery, or harvest him.
Third agenda[edit]
- Buy guns.
- Do all the quests you can, loot and butcher anything and anyone you see.
- Buy cloth from your neighbors.
- Once you've researched complex clothing, make parkas and tuques with cloth.
- Make and sell human leather dusters.
Notes[edit]
Make sure to buy some decent guns since your researcher colonist will likely have to defend themself alone while your other colonist is outside trading. Fortunately, you'll be so poor that even on the hardest difficulty, it's likely you'll only face raids of one single melee enemy for the whole first year.
Once your colonists have parkas and tuques you should take every opportunity available to go to another map. Your trading colonist should always be either trading or doing quests. Do not forget to take a bedroll with them on quests. Quests that matter now include:
You'll have more things to care about here than you normally would. It's important that you butcher every animal you find and every raider you kill on the quest locations. You might find your previous colonists (which you sold before) on those quests. If your human leather clothes and organs business is doing well, you can afford to bring one more person to your colony. Don't forget that you'll have to buy more meals for each person you save. Anyone you don't like can be sold or harvested once you return home.
Your research is really slow, since you only have one person at home taking care of everything and doing research at the same time. So another thing to focus on is furniture that you can carry home, since it will take a while for you to be able to make them. Heaters, batteries and turrets are also great to bring home. You don't have electricity yet, but once you do, you're going to have lots of things to plug in.
Make sure you have good clothes before winter starts. It's also about the right time to get rid of tainted clothes and make your own. Go buy cloth and make some decent parkas and tuques with it. Most importantly, make and sell lots of human leather dusters because they are worth a lot.
Fourth agenda[edit]
- Research complex furniture.
- Make beds.
- Replace your walls with stone.
- Replace the cloth parkas with better insulating parkas.
Notes[edit]
Winter makes caravans even worse than they already are. Despite that, you can never stop trading -- nor can you stop doing quests.
Time to make improvements. If you have at least two rooms and all the necessary workbenches, you can start replacing your walls with stone so raiders won't try to set them on fire. Alternatively you can put a second layer over your walls made of stone. Replace your bedrolls with beds. If you want, you can also make some comfortable human leather armchairs and human leather animal beds.
Try to replace your cloth(cold insulation 18) for bearskin(cold insulation 20), bluefur(cold insulation 20), foxfur(cold insulation 20), devilstrand(cold insulation 20), alpaca wool(cold insulation 22), synthread(cold insulation 22), wolfskin(cold insulation 24), muffalo wool(cold insulation 24), megasloth wool(cold insulation 26), hyperweave(cold insulation 26), chinchilla fur(cold insulation 30), heavy fur(cold insulation 30) or thrumbofur(cold insulation 34).
Your best bet is thrumbofur parkas with muffalo wool tuques. Thrumbo is the only animal guaranteed to show up in sea ice and you should already have a Muffalo with you for wool.
Fifth agenda[edit]
- Research electricity.
- Set up defenses.
- Set up power.
- Make a kitchen.
Notes[edit]
Your second year will be just as hard as the first one. You still have to harvest and eat your enemies while trading human leather dusters and organs for materials for your base.
You probably already learned to live from trading and quests by now, and may add another colonist. You should not expect to finish electricity before the end of the second year. So unfortunately, your food will spoil in the second summer. You can try to keep the stocks low to avoid loses or turn your food into pemmican.
Now however, you've got more people so you've got to set up some kind of defense, because raiders will be more numerous. This place is wide open, so you want to make an enclosed environment where you can shoot raiders from behind sandbags without getting outranged. In other words, you want a killbox. Once you finish electricity, you can finally use those turrets that you got from enemy outposts. If you could not bring any batterys home from quests, you'll have to research them now.
When you are setting up power, keep in mind that solar generators will not work at all during winter in sea ice.
With electricity, you can finally make a electric stove so you may stop buying wood.
Sixth agenda[edit]
- Research air conditioning.
- Make a freezer.
- Research nutrient paste.
- Make a nutrient paste dispenser.
- Research microelectronics.
- Make a comms console.
Notes[edit]
Your third year will come with lots of improvements and you can finally start feeling like you are playing on a normal map.
Your first priority after electricity is air conditioning, so you stop losing all your food in summer. Once you're done researching it, make a freezer. That will even allow you to accept more people in your colony since your food now lasts forever.
Then you want to make the almighty nutrient paste dispenser. It frees your cooker to do other stuff, completely prevents food poisoning and reduces your food consumption by 40%. You may even buy another Muffalo now to speed up trading.
Then, to increase your trading opportunities, you want a comms console. Any bulks good trade ship that shows up will be a blessing to your colony development.
BONUS: Buy Joywires[edit]
You might have noticed by now that your worst enemy isn't the hunger or the raiders, but the mood penalties that come with harvesting and eating people. Still, you can't stop it, since without that you'd lose your main source of food and your two main sources of silver (human leather dusters and organs).
Now that you have a little extra silver, you can buy a solution: the Joywire. Overall, in such a stressful colony this implant is well worth it. The drawbacks of the Joywire can later be offset with bionics.
Seventh agenda[edit]
- Research hydroponics.
- Make a greenhouse.
- Research biofuel refining.
- Research gun turrets.
Notes[edit]
You are on your fourth year and still have yet to plant something, so you start wondering if you even need to plant anything at all.
A greenhouse will require a lot of power, which means you will have to defend a larger area to put extra wind turbines in. You will also want to add a lot more batteries to store power at night so it may be used during the day. Make sure that your greenhouse is as small as possible to take less power, and is covered by double walls to increase insulation.
The greenhouse will allow you to stop buying food to survive and stop the cannibalism. Of course, it will also allow you to have more colonists. But first, you should plant some healroot so you can harvest organs without using good medicine. Also plant smokeleaf and psychoid plant, so you can make smokeleaf joints and psychite tea to reduce the overall stress in your colony. Then you may plant some food.
Without the cannibalism, you may turn your human meat into chemfuel. Then you can use chemfuel powered generators during winter and solar generators during other seasons.
You are getting wealthy and the raiders know it. Eventually, the turrets you get from quests will not be enough, so you need to research them so that you can make more of them by yourself.
Eighth agenda[edit]
- Research and build a long-range mineral scanner.
Notes[edit]
There is one last thing worth focusing on in sea ice. The long-range mineral scanner.
The scanner works normally on sea ice. If you set a colonist to work on it full-time, it can pick up locations of minerals faster than you can retrieve them. Which means you can endlessly make quests for minerals to greatly increase the amount of materials available for you to build your base.
However, you should keep in mind that minerals are heavy, so you need lots of Muffalos to carry it. Like a whole 8 Muffalos and 6 colonists to mine Uranium. Which is why it's better to make it after your greenhouse, because then you can support all the Muffalos you need.
Tenth year[edit]
With all that empty space, make a huge symmetrical base.
Other scenarios specific[edit]
- Build 1 wind turbine and one heater inside small room when your colonists will spend the vast majority of time.
- Steel and components will be worth their weight in gold. Can be increased by ship chunks, meteors and traders.
- Obtain 1 advanced component at any cost.
- Research batteries and build 1-2 near the house.
- Then turn to hydroponic research. Until its done, build 3-4 batteries, 2-3 wind turbines, sun lamp and 1.5 farms per pawn. You have a source of food.
- Create advanced research table and research the deep drill and Ground-penetrating scanner. Build them, and you now have unlimited steel to build a base.
- From this moment, if you already have warm clothes, you can easily survive.
Naked Brutality - hopeless in Core. Technically possible by living nomadically, traveling through tiles to kill snow hares, and getting lucky with early events. Certain DLCs can make settling down possible:
- Ideology:
It is possible to "cheese" the scenario through an ideoligion that has rituals with the random recruit reward. Random recruits will come with a few meals, a weapon, and warm clothing, and the pawn itself can be used as human meat. Ancient complex rituals can also be used, generating a large deconstructable building that also provides a constant supply of raids. As of 1.5, rituals cannot stray too far from the comfortable temperature, but it can get warm enough in the day, OR a xenotype
with a high cold tolerance can be used. - Odyssey:
The ice dune landmark makes it possible for an ancient shrine to generate, potentially providing shelter and supplies if lucky enough to clear it. Fishing can provide a source of food once it is researched.