Games like Oil Rush
Games like Oil Rush include Bloons TD 6, Plague Inc: Evolved, Creeper World 3: Arc Eternal, They Are Billions, and Warstone TD. We matched them by the tags players give Oil Rush on Steam (Strategy, Indie, RTS, Tower Defense, and Dystopian ): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Plague Inc: Evolved
Shared: Strategy · Indie · Singleplayer

Creeper World 3: Arc Eternal
Shared: Strategy · Indie · Tower Defense

They Are Billions
Shared: Strategy · RTS · Tower Defense

Warstone TD
Shared: Strategy · Indie · Tower Defense

Age of Empires II (Retired)
Shared: Strategy · RTS · Multiplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · Singleplayer

Wargame: Red Dragon
Shared: Strategy · RTS · Multiplayer

Company of Heroes 2
Shared: Strategy · RTS · Multiplayer

Infested Planet
Shared: Strategy · Tower Defense · RTS

Mindustry
Shared: Tower Defense · Strategy · RTS

Total War: WARHAMMER II
Shared: Strategy · RTS · Singleplayer

Rusted Warfare - RTS
Shared: Strategy · RTS · Indie

Castle Story
Shared: Strategy · Indie · Tower Defense

Dungeon Defenders
Shared: Strategy · Tower Defense · Multiplayer

Company of Heroes 3
Shared: Strategy · RTS · Singleplayer

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

Defense Grid: The Awakening
Shared: Strategy · Tower Defense · Indie

Command & Conquer™ Remastered Collection
Shared: Strategy · RTS · Multiplayer

Orcs Must Die! 2
Shared: Strategy · Tower Defense · Indie

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

Circle Empires
Shared: Strategy · Indie · RTS

Age of Empires III: Definitive Edition
Shared: Strategy · RTS · Multiplayer

Age of Empires: Definitive Edition
Shared: Strategy · RTS · Singleplayer