Single-player games like Science Monster: Grafted Heart
Below are 8 single-player Steam games similar to Science Monster: Grafted Heart, 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 Science Monster: Grafted Heart page.
Ranked picks
- 1
Gunblade Ranger
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
An action shooting Roguelite focused on relentless attacks and brutal executions. Fight through the wasteland, execute enemies to restore ammo, collect weapons and mutations, and create your own killing build. Local 2 player co-op supported.
- 2
Vault Apocalypse
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
Vault Apocalypse is a top-down, roguelite twin-stick arena shooter where you fight hordes of monsters while assembling powerful, synergistic builds. Pick your weapons, refine your build and destroy the keepers of the vault.
- 3
DET-33
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
A bullet-heaven roguelite in the ruins of new London. Take contracts from four warring factions, build a gun that breaks the game, and reach the evac before the city closes over you. 700+ weapons, interlocking build engines, and a fresh map every run.
- 4
Last convoy
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
Speed or firepower? Survive or dominate? Build your armored convoy car by car in this survivors-like auto-shooter. The fate of the planet rides on your choices — and your convoy.
- 5
Nuclear Throne
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter. Not 'the final hope of humanity' post-apocalyptic, but 'humanity is extinct and mutants and monsters now roam the world' post-apocalyptic. Can you reach the Nuclear Throne?
- 6
Circulo
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
A fast-paced 2D arena survival game built around geometric chaos.
- 7
Comet Force
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Strategy with Science Monster: Grafted Heart.
Comet Force is a Space Arena Shooter Action Roguelite. Build your camp, recruit to compose and grow your troop, collect upgrades and unique effects, fight enemies and bosses, and choose how the threat evolves. Keep your troop strong enough to survive all waves and close off the anomaly.
- 8
Steel Swarm: SURVIVOR
Single-player alternative to Science Monster: Grafted Heart — playable solo, no multiplayer required. Shares Action and Indie with Science Monster: Grafted Heart.
Steel Swarm: SURVIVOR is a fast-paced roguelite survivors game where you obliterate swarms with your drones. Set up formations, upgrade your drones, and overwhelm hordes of metal in each run. Take on enemy waves solo or in multiplayer co-op!