Sightstealer arrival
 | This article relates to content added by Anomaly (DLC). Please note that it will not be present without the DLC enabled. |
 | Spoiler warning: This page may contain details about the gameplay that might be considered spoilers. If you wish to enjoy the content first hand, you probably shouldn't continue reading beyond this point. |
 | This article is a stub. You can help RimWorld Wiki by expanding it. Reason: This page is included in the Raids project - a standardized format is needed for these pages, and is in development. See that page for details. |
Sightstealer Arrival is a major threat from the Anomaly DLC. Sightstealer Arrival requires monolith tier 1.
Summary
Sightstealer raids start with a single invisible Sightstealer from the map's edge, with no warning letter; or multiple sightstealers can raid after a "Distant shriek" raid letter. They will not trigger traps and generally will only be revealed when they're about to melee attack. They will trigger proximity detectors and emit a shrieking sound effect, which allows the player to know their presence, but not their exact location.
Multi-wave raids
At higher raid points, sightstealer raids can come in multiple waves. After the first raid is wiped out, a "Sightstealer howling" message will appear, indicating that more waves are to come; their arrival time ranges from a few hours to a few days. The next raid will include more sightstealers. After being defeated, the "Sightstealer howling" message may appear again, indicating even more raids to come.
1-2 Shards can be dropped from destroying the each wave.
Analysis
When encountered early, a single Sightstealer is unlikely to be a threat to even a group of brand new colonists. But when the "Sightstealer howling" message is triggered, it becomes dangerous for any colonist to go outside. Unlike manhunter events, sightstealers' raid give no warning for pawns to run inside, and their speed means that they can quickly surround any group of exposed pawns. In this case, it's best to lock your colonists in, install a proximity detector or turn up the game volume and listen for their howling sound. When you detect them, open a door and fight them like how you fight a manhunter event.