Extreme Cold Guide
Getting off on the right foot
As with any landing pause and survey the site.
If you wish to try your hand at harnessing an enclosed geothermal vent for heating then make sure to locate these early as it may influence where your first shelter goes.
You need to create shelter quickly, not only will your colonists get unhappy sleeping on the ground but they may not survive the nights. While you may have some grand scheme in mind for this biome, your first day is all about a roof and a door, anything will do, get it done by dark. If you have time to spare start hauling your resources down toward where your base will be.
First night heating without electrical power can be handled if you have wood accessible by constructing a campfire in a small room adjacent to your shelter, this way the heat leaks through the wall but doesnt cook your survivors. If you are not getting enough heat transferred through the wall then add a forbidden door into the room with the fire to increase the temperature. If you need to dismantle this room later and the fire is still lit remember to remove the roof before heading in.
If you can manage the shelter and so on with 2 then sending a hunter out with the rifle is not a bad plan. Try and bag something hairy or wooly, the corpse isnt rotting anytime soon and you will want that going forward...
Planning for success
(This section for first 48 hours thru end of first winter)
Other tips moving forward
(This section for anything else of note)