Single-player games like 30 Days On Ship: Castaway – The First Days
Below are 8 single-player Steam games similar to 30 Days On Ship: Castaway – The First Days, 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 30 Days On Ship: Castaway – The First Days page.
Ranked picks
- 1
Carbrix
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Action and Indie with 30 Days On Ship: Castaway – The First Days.
Carbrix is a sci-fi inspired multiplayer vehicle-building sandbox game where creativity meets action. Design and construct anything you can imagine—from sleek cars and powerful trucks to futuristic planes, bikes, and rockets.
- 2
GunGlyph
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Action and Indie with 30 Days On Ship: Castaway – The First Days.
A first-person voxel roguelite shooter. Descend, craft and temper your own guns, exploit ammo chemistry, fight unique enemies and face the bosses guarding every way down. Online co-op and local splitscreen.
- 3
POLYARIS
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Action and Indie with 30 Days On Ship: Castaway – The First Days.
Survive the Arctic in this first-person single-player game. Move by skis and boat, stay warm, dry, and hydrated, loot what's left behind, fight enemies, and escape the lonely north by any means. For fans of The Long Dark and other similar survival games.
- 4
Scavengers of Mars - Rover Survival Simulator
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Indie and Adventure with 30 Days On Ship: Castaway – The First Days.
SCAVENGERS OF MARS is an exploration-survival adventure set on the cold, desolate surface of Mars. Guide a Mars Rover to aid survivors of a catastrophic disaster as they await rescue from Earth. Explore, gather resources, craft and ensure their survival against the planet's harsh conditions.
- 5
On Your Own: Survival Inventory
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Adventure with 30 Days On Ship: Castaway – The First Days.
Rotate the grid and break groups of boxes to move your character, loot items and avoid enemies. Explore places with different loot and levels. Recycle items to get materials and craft new ones until you fix the radio and ask for help. A Rogue-lite Survival Explore Looting Crafting game.
- 6
Ghostorio
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Indie and Adventure with 30 Days On Ship: Castaway – The First Days.
Build automated factories in a bright afterlife. Mine, belt, power, and produce at massive scale, then defend your work from the spirits it attracts. A third-person factory game of automation, base building, and tower defense.
- 7
Left to Your Own Devices
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Indie and Adventure with 30 Days On Ship: Castaway – The First Days.
Something stripped you to pieces and left you in a junkyard. Now everything on this planet hunts you. Rebuild your body from salvage, craft devices to survive, and explore a hand-drawn world — down into the dark, or the planets above.
- 8
Mr. Nomad
Single-player alternative to 30 Days On Ship: Castaway – The First Days — playable solo, no multiplayer required. Shares Action and Indie with 30 Days On Ship: Castaway – The First Days.
Mr. Nomad is a survival base-building, tower defense game set in a post-apocalyptic world. Set a fortified base around your camper, craft, endure brutal zombie raids, hide what is precious to you in underground bunker and embark on dangerous missions in search of resources.