Single-player games like Terra Firma 2
Below are 11 single-player Steam games similar to Terra Firma 2, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Terra Firma 2 page.
Ranked picks
- 1

Substrate: Emergence
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Terra Firma 2.
Grow fluorescent cells that create mesmerizing emergent chaos. Simple mechanics hide deep complexity as cells evolve survival strategies through synergistic interactions. Catalogue successful lines and culture them to develop your own unique biology.
- 2

Sand in a Box
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Indie and Simulation with Terra Firma 2.
Sand in a Box is a 'falling sand' game that simulates thermal flow, electricity, radioactive decay, and gravity. Create art, experiment with physics, and craft your own simulation rules with user-friendly mod support!
- 3

Planetary Life
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Terra Firma 2.
Manipulate climate, add plants and evolve creatures in this planet and life sandbox simulation game. From cells to civilizations, spread life throughout the whole planet. Or just enjoy watching your creation burn!
- 4

XenoBloom
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Terra Firma 2.
A calm creative experience where you guide the development of an alien ecosystem. Study the environment and discover what drives it, or just sit back, relax, and see what happens!
- 5

Universe Sandbox
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Indie and Simulation with Terra Firma 2.
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
- 6

Natural Instincts: European Forest
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Terra Firma 2.
Protect the environment, and save it from harm! Give commands to the animals, observe their rituals and help them survive. Face different disasters, react to human presence and help the animal kingdom flourish in this unique, environmental experience!
- 7

Intelligent Design: An Evolutionary Sandbox
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy and Indie with Terra Firma 2.
A toy ecosystem with fully simulated genetics and evolution. Will you tinker with DNA or sit back, relax, and see if life finds a way?
- 8

Sandboxels
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Indie and Simulation with Terra Firma 2.
Falling-sand sandbox game with 500+ elements, chemistry, fire, life, food, and anything you can imagine.
- 9

SpaceEngine
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Indie and Simulation with Terra Firma 2.
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.
- 10

Minecraft: Story Mode - A Telltale Games Series
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required.
Episode 1 is now FREE - for a limited time! In Minecraft: Story Mode, playing as either a male or female hero named 'Jesse,' you’ll embark on a perilous adventure across the Overworld, through the Nether, to the End, and beyond.
- 11

Minecraft Legends
Single-player alternative to Terra Firma 2 — playable solo, no multiplayer required. Shares Strategy with Terra Firma 2.
Discover the mysteries of Minecraft Legends, a new action strategy game. Explore a gentle land of rich resources and lush biomes on the brink of destruction. The ravaging piglins have arrived, and it’s up to you to inspire your allies and lead them in strategic battles to save the Overworld!