Games like Terraforming Earth
Games like Terraforming Earth include The Binding of Isaac, The Binding of Isaac: Rebirth, Hades, Human Fall Flat, and Spelunky. We matched them by the tags players give Terraforming Earth on Steam (Indie, Action, Adventure, Robots, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

The Binding of Isaac
Shared: Indie · Action · Procedural Generation

The Binding of Isaac: Rebirth
Shared: Indie · Replay Value · Local Co-Op

Hades
Shared: Indie · Action · Roguelite

Human Fall Flat
Shared: Adventure · Action · Puzzle Platformer

Spelunky
Shared: Indie · Local Co-Op · Procedural Generation

FTL: Faster Than Light
Shared: Indie · Sci-fi · Procedural Generation

Skul: The Hero Slayer
Shared: Indie · Action · Roguelite

Rogue Legacy 2
Shared: Action · Indie · Adventure

Streets of Rogue
Shared: Roguelite · Action · Indie

Gunfire Reborn
Shared: Roguelite · Indie · Action

MO:Astray
Shared: Indie · Action · Adventure

ScourgeBringer
Shared: Indie · Action · Adventure

Dead Cells
Shared: Adventure · Roguelite · Action

BADLAND: Game of the Year Edition
Shared: Indie · Adventure · Action

Pikuniku
Shared: Indie · Adventure · Action

Heat Signature
Shared: Indie · Action · Procedural Generation

Juicy Realm
Shared: Indie · Action · Adventure

Ravenswatch
Shared: Action · Indie · Roguelite

Spelunky 2
Shared: Indie · Procedural Generation · Replay Value

LEGO® Star Wars™: The Skywalker Saga
Shared: Adventure · Action · Local Co-Op

Dungeon of the ENDLESS™
Shared: Indie · Adventure · Sci-fi

SYNTHETIK: Legion Rising
Shared: Indie · Action · Roguelite

Wizard of Legend
Shared: Action · Local Co-Op · Adventure

LIMBO
Shared: Indie · Puzzle Platformer · Adventure