Single-player games like Polygon Hell
Below are 9 single-player Steam games similar to Polygon Hell, 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 Polygon Hell page.
Ranked picks
- 1

Hardhats : Some Survival Required
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Indie with Polygon Hell.
Take on building projects in far away places with your construction crew! Nail guns and sledge hammers are used for more than just building. Find, craft and place building parts, survive the local wildlife, and escape the islands one happy customer at a time.
- 2

Tesera
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Indie with Polygon Hell.
Tesera is a sci-fi sandbox game in a mysterious alien world. Explore an endless voxel world, defend yourself against aggressive creatures and drones, building your dream settlement alone or with friends.
- 3

Planetation
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Indie with Polygon Hell.
On the harmstead you sow crops by day, plough hordes of alien pests by night, and spelunk the “Very Dark” depths whenever you damn well please. This bloodthirsty alien planet doesn’t want you here, but you’re a farmer in a tractormech so what do you care?
- 4

Tomo: Endless Blue
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Adventure with Polygon Hell.
Tomo: Endless Blue, a Monster-Taming ARPG set in a Voxel Open World. Set sail through the Endless Blue, an ocean realm home to mysterious creatures called Tomo. Team up to fight, build homes with friends, or craft wild vehicles to explore procedurally generated islands, villages and tales.
- 5

Voxile
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Indie with Polygon Hell.
Quest, craft, loot, build, destroy, and shoot your way through gorgeous voxel islands! Encounter mutated wildlife, discover secrets, and find out what went wrong in both pre-designed adventure and procedural survival worlds. Play in Early Access today--alone or with friends!
- 6

Cube World
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Indie and Adventure with Polygon Hell.
Cube World is a voxel-based action RPG with a focus on exploration. It takes place in a procedurally generated fantasy world made up entirely of cubes.
- 7

7 Days to Die
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action and Indie with Polygon Hell.
7 Days to Die is an open-world game that is a unique combination of first-person shooter, survival horror, tower defense, and role-playing games. Play the definitive zombie survival sandbox RPG that came first. Navezgane awaits!
- 8

Deep Rock Galactic
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Action with Polygon Hell.
Deep Rock Galactic is a 1-4 player co-op FPS featuring dwarven space miners, procedurally-generated destructible environments, and endless hordes of alien monsters. Explore cave systems, mine for minerals, and work together to survive!
- 9

Super Cube 3D
Single-player alternative to Polygon Hell — playable solo, no multiplayer required. Shares Free To Play with Polygon Hell.
Explore beautiful worlds and make new friends in this 3D MMO Platformer.