Games like Nexus Primordial
Games like Nexus Primordial include Dyson Sphere Program, Cookie Clicker, Mindustry, Factorio, and STAR WARS™ Empire at War - Gold Pack. We matched them by the tags players give Nexus Primordial on Steam (Casual, Strategy, RTS, 2D, and Automation): closest matches first, and among equally close ones the better-known games.

Dyson Sphere Program
Shared: Automation · Space · Resource Management

Cookie Clicker
Shared: Casual · Incremental · Idler

Mindustry
Shared: Automation · RTS · Strategy

Factorio
Shared: Automation · Strategy · Resource Management

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · RTS · Space

A Game About Feeding A Black Hole
Shared: Casual · Strategy · 2D

Iron Marines
Shared: Strategy · RTS · 2D

FTL: Faster Than Light
Shared: Strategy · Space · Sci-fi

Shelldiver
Shared: Casual · 2D · Resource Management

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · 2D

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · 2D · Strategy

Nodebuster
Shared: Casual · Strategy · 2D

Keep on Mining!
Shared: Casual · Incremental · Idler

Game Dev Tycoon
Shared: Strategy · Casual · 2D

Zup! S
Shared: Casual · 2D · Physics

Oxygen Not Included
Shared: 2D · Resource Management · Strategy

Circle Empires
Shared: Strategy · Casual · RTS

Orbitmine
Shared: Casual · Strategy · Space

shapez
Shared: Automation · Strategy · Resource Management

Battlefleet Gothic: Armada 2
Shared: Strategy · RTS · Space

Melvor Idle
Shared: Casual · 2D · Automation

Starvester
Shared: Strategy · Casual · Automation

Chef Knight
Shared: Strategy · Casual · 2D

Incredicer
Shared: Casual · Strategy · Incremental