Games like Dwelvers
Games like Dwelvers include Prison Architect, Oxygen Not Included, Evil Genius 2: World Domination, Factorio, and Dyson Sphere Program. We matched them by the tags players give Dwelvers on Steam (Base Building, Villain Protagonist, Underground, Management, and Sandbox): closest matches first, and among equally close ones the better-known games.

Prison Architect
Shared: Base Building · Sandbox · Management

Oxygen Not Included
Shared: Base Building · Management · Sandbox

Evil Genius 2: World Domination
Shared: Base Building · Villain Protagonist · Management

Factorio
Shared: Base Building · Sandbox · Management

Dyson Sphere Program
Shared: Base Building · Management · Building

RimWorld
Shared: Base Building · Sandbox · Management

Manor Lords
Shared: Base Building · Management · Sandbox

Dwarf Fortress
Shared: Base Building · Sandbox · Management

Kingdoms and Castles
Shared: Management · Base Building · Sandbox

Against the Storm
Shared: Base Building · Management · Building

Cities: Skylines
Shared: Management · Sandbox · Building

Timberborn
Shared: Sandbox · Base Building · Management

shapez
Shared: Base Building · Sandbox · Management

MachiaVillain
Shared: Villain Protagonist · Base Building · Management

Empires of the Undergrowth
Shared: Base Building · Management · Sandbox

Foundation
Shared: Sandbox · Management · Simulation

Global Rescue
Shared: Management · Base Building · Sandbox

Workers & Resources: Soviet Republic
Shared: Base Building · Management · Sandbox

Jurassic World Evolution 2
Shared: Management · Sandbox · Building

War for the Overworld
Shared: Base Building · Management · Sandbox

Dungeons 3
Shared: Villain Protagonist · Base Building · Management

Cities: Skylines II
Shared: Management · Sandbox · Building

Mad Games Tycoon
Shared: Management · Base Building · Sandbox

Rise of Industry
Shared: Management · Base Building · Strategy