Games like The Last Haven
Games like The Last Haven include Frostpunk, They Are Billions, Oxygen Not Included, Infection Free Zone, and Manor Lords. We matched them by the tags players give The Last Haven on Steam (Strategy, Base Building, Indie, Post-apocalyptic, and Simulation): closest matches first, and among equally close ones the better-known games.

Frostpunk
Shared: Strategy · Survival · City Builder

They Are Billions
Shared: Base Building · Strategy · Survival

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

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

Manor Lords
Shared: Strategy · Base Building · Simulation

Endzone - A World Apart
Shared: Strategy · Post-apocalyptic · Base Building

Kingdoms and Castles
Shared: Strategy · City Builder · Simulation

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

Frostpunk 2
Shared: Strategy · City Builder · Post-apocalyptic

Against the Storm
Shared: Strategy · Base Building · Simulation

RimWorld
Shared: Base Building · Strategy · Survival

Banished
Shared: Strategy · City Builder · Simulation

Dwarf Fortress
Shared: Base Building · Strategy · Simulation

Factorio
Shared: Base Building · Strategy · Resource Management

Workers & Resources: Soviet Republic
Shared: Strategy · Base Building · Simulation

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

IXION
Shared: Strategy · Base Building · City Builder

Kenshi
Shared: Survival · Post-apocalyptic · Simulation

Empires of the Undergrowth
Shared: Strategy · Base Building · Simulation

Foundation
Shared: Strategy · Simulation · City Builder

Sheltered
Shared: Base Building · Strategy · Post-apocalyptic

Prison Architect
Shared: Base Building · Simulation · Strategy

Planetbase
Shared: Base Building · Strategy · City Builder

Project Zomboid
Shared: Survival · Post-apocalyptic · Indie