Games like KeeperRL + Soundtrack
Games like KeeperRL + Soundtrack include Totally Accurate Battle Simulator, Mount & Blade II: Bannerlord, RimWorld, Stellaris, and Mount & Blade: Warband. We matched them by genre: closest matches first, and among equally close ones the better-known games.

Totally Accurate Battle Simulator
Shared: Sandbox · Strategy

Mount & Blade II: Bannerlord
Shared: Strategy · Sandbox

RimWorld
Shared: Strategy · Sandbox

Stellaris
Shared: Strategy · Sandbox

Mount & Blade: Warband
Shared: Strategy · Sandbox

Factorio
Shared: Sandbox · Strategy

Cities: Skylines
Shared: Strategy · Sandbox

Bloons TD 6
Shared: Strategy · Sandbox

Prison Architect
Shared: Sandbox · Strategy

The Scroll of Taiwu : Beyond The Dome
Shared: Sandbox · Strategy

Manor Lords
Shared: Strategy · Sandbox

Crusader Kings II
Shared: Strategy · Sandbox

Crusader Kings III
Shared: Strategy · Sandbox

Planet Coaster 2
Shared: Sandbox · Strategy

Anno 117: Pax Romana
Shared: Strategy · Sandbox

Planet Coaster
Shared: Sandbox · Strategy

Anno 1800
Shared: Strategy · Sandbox

Tropico 5
Shared: Strategy · Sandbox

Amazing Cultivation Simulator
Shared: Sandbox · Strategy

Jurassic World Evolution
Shared: Strategy · Sandbox

Age of History II
Shared: Strategy · Sandbox

Cities: Skylines II
Shared: Sandbox · Strategy

Foundation
Shared: Strategy · Sandbox

Total Tank Simulator
Shared: Strategy · Sandbox