Games like Sheltered
Games like Sheltered include Oxygen Not Included, Frostpunk, Factorio, This War of Mine, and Kenshi. We matched them by the tags players give Sheltered on Steam (Survival, Base Building, Post-apocalyptic, Pixel Graphics, and Strategy): closest matches first, and among equally close ones the better-known games.

Oxygen Not Included
Shared: Base Building · Survival · Resource Management

Frostpunk
Shared: Survival · Post-apocalyptic · Strategy

Factorio
Shared: Base Building · Survival · Resource Management

This War of Mine
Shared: Survival · Strategy · Base Building

Kenshi
Shared: Survival · Post-apocalyptic · RPG

RimWorld
Shared: Base Building · Survival · Strategy

7 Days to Die
Shared: Survival · Base Building · Post-apocalyptic

Terraria
Shared: Survival · Pixel Graphics · 2D

Forager
Shared: Survival · Pixel Graphics · Base Building

Endzone - A World Apart
Shared: Survival · Post-apocalyptic · Strategy

Frostpunk 2
Shared: Survival · Strategy · Post-apocalyptic

Space Haven
Shared: Base Building · Survival · Strategy

Sheltered 2
Shared: Survival · Post-apocalyptic · Base Building

Manor Lords
Shared: Base Building · Strategy · Management

They Are Billions
Shared: Base Building · Survival · Strategy

Until We Die
Shared: Survival · Base Building · Pixel Graphics

Project Zomboid
Shared: Survival · Post-apocalyptic · Building

Infection Free Zone
Shared: Base Building · Post-apocalyptic · Survival

Graveyard Keeper
Shared: Pixel Graphics · Management · RPG

The Escapists
Shared: Pixel Graphics · Strategy · Survival

Against the Storm
Shared: Base Building · Strategy · Management

The Last Caretaker
Shared: Survival · Base Building · Resource Management

Satisfactory
Shared: Base Building · Resource Management · Building

Prison Architect
Shared: Base Building · Strategy · Building