Games like Plebs and Pillagers
Games like Plebs and Pillagers include Kingdoms and Castles, Settlement Survival, Foundation, Banished, and Prison Architect. We matched them by the tags players give Plebs and Pillagers on Steam (Exploration, Strategy, Side Scroller, Colony Sim, and City Builder): closest matches first, and among equally close ones the better-known games.

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

Settlement Survival
Shared: City Builder · Colony Sim · Building

Foundation
Shared: Strategy · City Builder · Medieval

Banished
Shared: Strategy · Colony Sim · City Builder

Prison Architect
Shared: Strategy · Building · Colony Sim

Oxygen Not Included
Shared: Colony Sim · Building · Strategy

Farthest Frontier
Shared: Strategy · City Builder · Building

Dwarf Fortress
Shared: Colony Sim · Strategy · City Builder

Manor Lords
Shared: Strategy · City Builder · Building

Frostpunk
Shared: Strategy · City Builder · Colony Sim

Tavern Master
Shared: Strategy · Building · Management

RimWorld
Shared: Colony Sim · Strategy · Management

Against the Storm
Shared: Strategy · City Builder · Building

Ostriv
Shared: Strategy · City Builder · Colony Sim

Kingdom Two Crowns
Shared: City Builder · Building · Strategy

IXION
Shared: Strategy · City Builder · Colony Sim

ISLANDERS
Shared: Strategy · City Builder · Relaxing

Timberborn
Shared: Colony Sim · City Builder · Building

Space Haven
Shared: Colony Sim · Strategy · Building

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

Stonehearth
Shared: Colony Sim · City Builder · Strategy

Kingdom Eighties
Shared: Exploration · Side Scroller · City Builder

DAVE THE DIVER
Shared: Exploration · Management · Relaxing

Terraria
Shared: Exploration · Crafting · Building