Games like Paragon Pioneers
Games like Paragon Pioneers include Prison Architect, Kingdoms and Castles, Foundation, Farthest Frontier, and Banished. We matched them by the tags players give Paragon Pioneers on Steam (Idler, Colony Sim, City Builder, Building, and Crafting): closest matches first, and among equally close ones the better-known games.

Prison Architect
Shared: Building · Colony Sim · City Builder

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

Foundation
Shared: City Builder · Medieval · Management

Farthest Frontier
Shared: City Builder · Building · Colony Sim

Banished
Shared: Colony Sim · City Builder · Medieval

Manor Lords
Shared: City Builder · Building · Management

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

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

Frostpunk
Shared: City Builder · Colony Sim · Building

Cities: Skylines
Shared: City Builder · Building · Management

Kingdoms Reborn
Shared: Colony Sim · City Builder · Management

Against the Storm
Shared: City Builder · Building · Colony Sim

Tavern Master
Shared: Building · Management · Medieval

Settlement Survival
Shared: City Builder · Colony Sim · Building

Workers & Resources: Soviet Republic
Shared: City Builder · Building · Colony Sim

Ostriv
Shared: City Builder · Colony Sim · Building

Academia : School Simulator
Shared: Colony Sim · City Builder · Management

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

Stronghold Crusader HD (2012)
Shared: City Builder · Colony Sim · Building

RimWorld
Shared: Colony Sim · Base Building · Management

Timberborn
Shared: Colony Sim · City Builder · Building

Norland
Shared: City Builder · Colony Sim · Building

Shop Titans
Shared: Idler · Crafting · Management

Cities: Skylines II
Shared: City Builder · Building · Management