Games like Elder Chaos
Games like Elder Chaos include Creeper World 3: Arc Eternal, Infested Planet, Warstone TD, Defense Grid: The Awakening, and They Are Billions. We matched them by the tags players give Elder Chaos on Steam (Indie, Strategy, Lovecraftian, Tower Defense, and RTS): closest matches first, and among equally close ones the better-known games.

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

Infested Planet
Shared: Strategy · Tower Defense · Indie

Warstone TD
Shared: Strategy · Indie · Tower Defense

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

They Are Billions
Shared: Strategy · RTS · Tower Defense

Taur
Shared: Strategy · Tower Defense · Indie

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

Warpips
Shared: Strategy · Tower Defense · RTS

The King is Watching
Shared: Tower Defense · RTS · Strategy

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

Dungeon of the ENDLESS™
Shared: Strategy · Indie · Tower Defense

Mindustry
Shared: Tower Defense · Strategy · RTS

Nordhold
Shared: Strategy · Tower Defense · Indie

Bloons TD 6
Shared: Strategy · Tower Defense

Creeper World: Anniversary Edition
Shared: Indie · Strategy · Tower Defense

Anomaly Warzone Earth
Shared: Indie · Strategy · Tower Defense

MarZ: Tactical Base Defense
Shared: Strategy · Tower Defense · Indie

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · RTS

GemCraft - Chasing Shadows
Shared: Strategy · Indie · Tower Defense

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

Buggos
Shared: Strategy · RTS · Indie

Rusted Warfare - RTS
Shared: Strategy · RTS · Indie

Creeper World 4
Shared: Tower Defense · Strategy · RTS

Crown of Greed
Shared: Indie · Strategy · RTS