Single-player games like Project Castaway
Below are 11 single-player Steam games similar to Project Castaway, 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 Project Castaway page.
Ranked picks
- 1
Stranded Deep
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Adventure with Project Castaway.
Take the role of a plane crash survivor stranded somewhere in the Pacific Ocean. Come face to face with some of the most life threatening scenarios that will result in a different experience each time you play. Scavenge. Discover. Survive.
- 2
Survival: Fountain of Youth
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Adventure with Project Castaway.
Survival: Fountain of Youth is a challenging single-player open-world adventure game set on the Caribbean islands. Survive as a shipwrecked 16th-century explorer, craft tools and shelter, and uncover the secrets of both an ancient civilization and your own fate.
- 3
Green Hell
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Adventure with Project Castaway.
Plunge into the open-world survival simulation set in the extreme conditions of the uncharted Amazon jungle. Use real-life survival techniques to craft, hunt, fight, and gather resources, set a makeshift shelter, or raise a fortress. Survive alone or team up with your friends and challenge the jungle together.
- 4
Raft
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Adventure with Project Castaway.
Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks!
- 5
Sunkenland
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action with Project Castaway.
Get ready for a Waterworld-themed survival game with modular base building, sunken city scavenging, crafting, base defense, and invasions of NPC clans for resources and territory. Ready for the water apocalypse?
- 6
The Infected
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Casual with Project Castaway.
The Infected is a sandbox, first-person, open-world survival game. Build bases, craft, farm, hunt, and survive changing seasons. Choose whether to face the hybrid “Vambies” or turn them off for a pure survival experience.
- 7
Valheim
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Adventure with Project Castaway.
A collaborative exploration and survival game for 1-10 players, set in a procedurally generated afterlife inspired by Viking culture. Battle, build, and conquer your way to a saga worthy of Odin’s patronage!
- 8
Sons Of The Forest
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Adventure with Project Castaway.
Sent to find a missing billionaire on a remote island, you find yourself in a cannibal-infested hellscape. Craft, build, and struggle to survive, alone or with friends, in this terrifying new open-world survival horror simulator.
- 9
Windrose
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Action and Adventure with Project Castaway.
Embark on a PvE survival adventure in the Age of Piracy. Fight on land and sea, solo or with friends. Build, craft and explore vast open world filled with dark secrets. Master soulslite combat and take on challenging bosses, command your ship and plunder unspoken treasures!
- 10
Tech Corp.
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Casual with Project Castaway.
Tech Corp. is a game where you try to become the biggest tech company in the world . Your goal is to become the next big shot in the tech industry. The game also takes place through history. Starting in the early 90's and going to present time.
- 11
Quiz Night Tonight!
Single-player alternative to Project Castaway — playable solo, no multiplayer required. Shares Casual with Project Castaway.
Step into an online Game Show! Trivia has never been so much fun. Featuring thousands questions, on a variety of genres/topics. Experience Trivia like never before. Play with or without VR.