Games like This War of Mine
Games like This War of Mine include Frostpunk, Frostpunk 2, RimWorld, Oxygen Not Included, and The Long Dark. We matched them by the tags players give This War of Mine on Steam (Survival, War, Atmospheric, Singleplayer, and Strategy): closest matches first, and among equally close ones the better-known games.

Frostpunk
Shared: Survival · Strategy · Resource Management

Frostpunk 2
Shared: Survival · Strategy · Singleplayer

RimWorld
Shared: Survival · Strategy · Base Building

Oxygen Not Included
Shared: Survival · Singleplayer · Base Building

The Long Dark
Shared: Survival · Atmospheric · Singleplayer

The Last Caretaker
Shared: Survival · Singleplayer · Base Building

Factorio
Shared: Survival · Base Building · Strategy

Quarantine Zone: The Last Check
Shared: Singleplayer · Simulation · Choices Matter

IXION
Shared: Survival · Strategy · Base Building

The Alters
Shared: Survival · Base Building · Strategy

Totally Accurate Battle Simulator
Shared: War · Simulation · Strategy

Sheltered
Shared: Survival · Strategy · Base Building

Endzone - A World Apart
Shared: Survival · Strategy · Simulation

The Pale Beyond
Shared: Survival · Singleplayer · Choices Matter

Stranded: Alien Dawn
Shared: Survival · Strategy · Base Building

Mr. Prepper
Shared: Survival · Simulation · Base Building

This Is the Police
Shared: Strategy · Singleplayer · Choices Matter

Infection Free Zone
Shared: Survival · Base Building · Strategy

Beholder
Shared: Choices Matter · Atmospheric · Strategy

Sons Of The Forest
Shared: Survival · Base Building · Crafting

911 Operator
Shared: Strategy · Singleplayer · Simulation

Surviving the Aftermath
Shared: Survival · Strategy · Simulation

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Survival · Atmospheric · Singleplayer

Don't Starve Together
Shared: Survival · Crafting · Atmospheric