Games like Hell Architect: Prologue
Games like Hell Architect: Prologue include Prison Architect, RimWorld, Manor Lords, Kingdoms and Castles, and Dwarf Fortress. We matched them by the tags players give Hell Architect: Prologue on Steam (City Builder, Colony Sim, Dungeon Crawler, Base Building, and Open World): closest matches first, and among equally close ones the better-known games.

Prison Architect
Shared: Colony Sim · Base Building · Sandbox

RimWorld
Shared: Colony Sim · Base Building · Sandbox

Manor Lords
Shared: City Builder · Base Building · Strategy

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

Dwarf Fortress
Shared: Colony Sim · Base Building · City Builder

Oxygen Not Included
Shared: Colony Sim · Base Building · Building

Against the Storm
Shared: City Builder · Base Building · Strategy

Workers & Resources: Soviet Republic
Shared: City Builder · Base Building · Strategy

Empires of the Undergrowth
Shared: City Builder · Base Building · Colony Sim

Timberborn
Shared: City Builder · Colony Sim · Sandbox

Norland
Shared: City Builder · Colony Sim · Base Building

Banished
Shared: City Builder · Colony Sim · Strategy

Cities: Skylines
Shared: City Builder · Building · Sandbox

Foundation
Shared: City Builder · Sandbox · Strategy

Academia : School Simulator
Shared: City Builder · Colony Sim · Base Building

Ratopia
Shared: Colony Sim · Base Building · City Builder

Space Haven
Shared: Colony Sim · Base Building · City Builder

Settlement Survival
Shared: City Builder · Colony Sim · Building

Dyson Sphere Program
Shared: Base Building · Open World · Building

Stonehearth
Shared: City Builder · Colony Sim · Sandbox

Frostpunk
Shared: City Builder · Colony Sim · Base Building

Songs of Syx
Shared: City Builder · Colony Sim · Base Building

Cult of the Lamb
Shared: Base Building · Dungeon Crawler · Colony Sim

Ostriv
Shared: City Builder · Colony Sim · Strategy