Games like Imagine Earth
Games like Imagine Earth include Timberborn, Infection Free Zone, Prison Architect, Songs of Syx, and Kingdoms and Castles. We matched them by the tags players give Imagine Earth on Steam (Nature, Top-Down, Lore-Rich, Post-apocalyptic, and Relaxing): closest matches first, and among equally close ones the better-known games.

Timberborn
Shared: Colony Sim · Nature · City Builder

Infection Free Zone
Shared: Post-apocalyptic · City Builder · Colony Sim

Prison Architect
Shared: Colony Sim · Top-Down · Sandbox

Songs of Syx
Shared: Colony Sim · City Builder · Grand Strategy

Kingdoms and Castles
Shared: Colony Sim · City Builder · Sandbox

The Wandering Village
Shared: Post-apocalyptic · City Builder · Nature

Banished
Shared: Colony Sim · City Builder · Relaxing

Going Medieval
Shared: Colony Sim · Nature · City Builder

Frostpunk
Shared: Post-apocalyptic · City Builder · Colony Sim

Endzone - A World Apart
Shared: Post-apocalyptic · City Builder · Colony Sim

Ballads of Hongye: REBORN
Shared: Nature · Relaxing · City Builder

Foundation
Shared: City Builder · Relaxing · Sandbox

Fabledom
Shared: Relaxing · Colony Sim · City Builder

They Are Billions
Shared: Colony Sim · Post-apocalyptic · City Builder

Ostriv
Shared: City Builder · Colony Sim · Strategy

Farthest Frontier
Shared: City Builder · Colony Sim · Strategy

Planet Zoo
Shared: Nature · City Builder · Sandbox

Terra Nil
Shared: Nature · Relaxing · City Builder

ISLANDERS
Shared: Relaxing · City Builder · Colony Sim

Kenshi
Shared: Post-apocalyptic · Sandbox · Immersive Sim

Dorfromantik
Shared: Relaxing · City Builder · Casual

Academia : School Simulator
Shared: Colony Sim · City Builder · Top-Down

Flotsam
Shared: Colony Sim · City Builder · Sandbox

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