Games like The Ancient Lands
Games like The Ancient Lands include RimWorld, Oxygen Not Included, Rise to Ruins, Banished, and This War of Mine. We matched them by the tags players give The Ancient Lands on Steam (Strategy, Simulation, Early Access, Survival, and Singleplayer): closest matches first, and among equally close ones the better-known games.

RimWorld
Shared: Strategy · Survival · Base Building

Oxygen Not Included
Shared: Survival · Base Building · Singleplayer

Rise to Ruins
Shared: Strategy · Survival · Simulation

Banished
Shared: Strategy · Simulation · Survival

This War of Mine
Shared: Survival · Strategy · Singleplayer

Songs of Syx
Shared: Strategy · Colony Sim · Base Building

Frostpunk
Shared: Strategy · Survival · Colony Sim

Infection Free Zone
Shared: Strategy · Base Building · Simulation

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

Going Medieval
Shared: Strategy · Survival · Base Building

Stranded: Alien Dawn
Shared: Simulation · Strategy · Survival

The Escapists
Shared: Strategy · Simulation · Singleplayer

Dawn of Man
Shared: Strategy · Survival · Simulation

Manor Lords
Shared: Strategy · Simulation · Base Building

Ostriv
Shared: Strategy · Simulation · Colony Sim

Plague Inc: Evolved
Shared: Strategy · Simulation · Singleplayer

Prison Architect
Shared: Simulation · Strategy · Base Building

Dwarf Fortress
Shared: Simulation · Strategy · Base Building

Stonehearth
Shared: Strategy · Survival · Simulation

Amazing Cultivation Simulator
Shared: Simulation · Strategy · Survival

Space Haven
Shared: Strategy · Survival · Simulation

Feed and Grow: Fish
Shared: Simulation · Survival · Early Access

They Are Billions
Shared: Strategy · Survival · Base Building

Frostpunk 2
Shared: Strategy · Survival · Simulation