Games like White Signal
Games like White Signal include This War of Mine, RimWorld, Frostpunk, Dawn of Man, and Oxygen Not Included. We matched them by the tags players give White Signal on Steam (Colony Sim, Simulation, Immersive Sim, Choices Matter, and Lore-Rich): closest matches first, and among equally close ones the better-known games.

This War of Mine
Shared: Survival · Simulation · Choices Matter

RimWorld
Shared: Colony Sim · Strategy · Survival

Frostpunk
Shared: Colony Sim · Survival · Strategy

Dawn of Man
Shared: Colony Sim · Simulation · Strategy

Oxygen Not Included
Shared: Colony Sim · Survival · Simulation

Banished
Shared: Colony Sim · Simulation · Strategy

IXION
Shared: Colony Sim · Strategy · Survival

Beholder
Shared: Choices Matter · Strategy · Simulation

SPORE™
Shared: Colony Sim · Simulation · Exploration

Death and Taxes
Shared: Simulation · Choices Matter · Strategy

Papers, Please
Shared: Simulation · Point & Click · Indie

911 Operator
Shared: Simulation · Strategy · Choices Matter

60 Seconds! Reatomized
Shared: Strategy · Immersive Sim · Exploration

Space Haven
Shared: Colony Sim · Simulation · Strategy

Amazing Cultivation Simulator
Shared: Simulation · Colony Sim · Strategy

Beholder 2
Shared: Simulation · Choices Matter · Strategy

Kenshi
Shared: Immersive Sim · Survival · Simulation

Frostpunk 2
Shared: Simulation · Strategy · Survival

The Pale Beyond
Shared: Choices Matter · Simulation · Survival

60 Seconds!
Shared: Immersive Sim · Exploration · Strategy

Dwarf Fortress
Shared: Colony Sim · Simulation · Strategy

Mandate Of Heaven
Shared: Simulation · Strategy · Choices Matter

Plague Inc: Evolved
Shared: Simulation · Strategy · Casual

Stranded: Alien Dawn
Shared: Simulation · Colony Sim · Survival