Games like plexum
Games like plexum include Factorio, Dyson Sphere Program, Satisfactory, shapez, and Oxygen Not Included. We matched them by the tags players give plexum on Steam (Automation, Resource Management, Building, Simulation, and Base Building): closest matches first, and among equally close ones the better-known games.

Factorio
Shared: Automation · Resource Management · Base Building

Dyson Sphere Program
Shared: Automation · Building · Resource Management

Satisfactory
Shared: Automation · Base Building · Building

shapez
Shared: Automation · Resource Management · Base Building

Oxygen Not Included
Shared: Resource Management · Base Building · Building

Captain of Industry
Shared: Automation · Resource Management · Simulation

Cities: Skylines
Shared: Building · Simulation · Strategy

shapez 2 - Factory
Shared: Automation · Building · Simulation

Jurassic World Evolution
Shared: Building · Simulation · Strategy

Prison Architect
Shared: Building · Simulation · Base Building

Hydroneer
Shared: Automation · Base Building · Building

Manor Lords
Shared: Simulation · Strategy · Base Building

Jurassic World Evolution 2
Shared: Building · Simulation · Strategy

Automation Empire
Shared: Automation · Simulation · Base Building

Against the Storm
Shared: Simulation · Strategy · Building

MineMogul
Shared: Automation · Building · Strategy

The Last Caretaker
Shared: Automation · Base Building · Crafting

Schedule I
Shared: Simulation · Automation · Base Building

Mindustry
Shared: Automation · Resource Management · Base Building

Cities: Skylines II
Shared: Building · Simulation · Strategy

Kingdoms and Castles
Shared: Resource Management · Simulation · Building

RimWorld
Shared: Base Building · Strategy · Simulation

Little Big Workshop
Shared: Simulation · Building · Resource Management

This War of Mine
Shared: Strategy · Simulation · Resource Management