IMHO.

Games like Undefined Survivors -アンディファインド サバイバーズ-

If Undefined Survivors -アンディファインド サバイバーズ- is your kind of game, the closest matches are Runi, Island Raft Survival 2021: Ocean Escape and Sundermead — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Undefined Survivors -アンディファインド サバイバーズ-: This open-world survival crafting game puts you, an amnesiac protagonist, on a journey to rediscover your true self. Explore islands and oceans, crafting weapons, watercraft, and shelters to survive. Face threats as you uncover the mysteries of your past and reclaim lost memories.

2025ActionAdventureEarly Access29.99 USDWindowsby Runpath Inc.
Undefined Survivors -アンディファインド サバイバーズ- — Steam game cover

Players who liked Undefined Survivors -アンディファインド サバイバーズ- also play

Steam players who put hours into Undefined Survivors -アンディファインド サバイバーズ- also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Runi

    WHY THIS

    Top pick for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    A cooperative low-poly survival adventure. Gather resources, craft tools, build shelter, and explore a vast wilderness with friends as you fight to endure together.

    IndieAdventureSimulationSteam ↗
  2. Island Raft Survival 2021: Ocean Escape

    WHY THIS

    Second-strongest match for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Adventure and Early Access with Undefined Survivors -アンディファインド サバイバーズ-.

    Join Realistic Island Raft Survival Simulator with Creative Survival Modes!

    2021AdventureEarly Access2.99 USDSteam ↗
  3. Sundermead

    WHY THIS

    Third-strongest match for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Sundermead is an open-world, casual RPG where you can build a farm to live peacefully out in the wilderness with your friends. Beware though, there is more to this land than first meets the eye!

    2024ActionIndieAdventure2.99 USDSteam ↗
  4. Frost Survival VR

    WHY THIS

    Ranked #4 for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Sandbox Survival in VR. Face a frozen wilderness solo or in co-op - build a shelter, craft tools, hunt for food, and manage your resources to endure harsh conditions. Strategize your moves against unpredictable weather and lurking dangers. And remember to keep yourself safe and sane!

    2025IndieAdventureSimulation14.99 USDSteam ↗
  5. Open Fishing XL

    WHY THIS

    Ranked #5 for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries.

    Open Fishing XL is an open world fishing game focused on creating a relaxing experience. Fill out a book with 115 fish species, buy rods, items, boats and more, explore the large map, identify cute insects, draw your own map, and enjoy fishing without worries with intuitive fishing mechanics.

    2023SportsSimulationCasual4.99 USDSteam ↗
  6. Crazy Caveman

    WHY THIS

    Ranked #6 for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Become a caveman, survive by building, fishing, and hunting.

    2026ActionIndieAdventure0.69 USDSteam ↗
  7. Escape Island

    WHY THIS

    Ranked #7 for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    "Escape Island: An exciting survival adventure! Your mission: Escape from a deserted island full of dangers. Explore, hunt and collect resources to survive. But beware of lurking threats! Use your intelligence and skills to overcome obstacles and escape!"

    2024ActionIndieAdventure6.99 USDSteam ↗
  8. Everdream Valley

    WHY THIS

    Ranked #8 for Undefined Survivors -アンディファインド サバイバーズ- fans by collaborative filtering across millions of Steam libraries. Shares Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    A farming adventure with a dash of magic. Play solo or up to a 4-player coop. By day, restore your quaint farm into a summer paradise. Explore, raise crops, care for animals and rebuild your home. At night inhabit various creatures through your dreams and bring enchantment to the valley.

    2023IndieAdventureCasual24.99 USDDeck PlayableSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Undefined Survivors -アンディファインド サバイバーズ- at current Steam store prices.

  1. Terraria

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

    2011ActionIndieAdventure9.99 USDDeck VerifiedSteam ↗
  2. Lethal Company

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

    2023ActionIndieAdventure9.99 USDDeck PlayableSteam ↗
  3. Left 4 Dead 2

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.

    2009Action9.99 USDDeck VerifiedSteam ↗
  4. Hollow Knight

    WHY THIS

    Priced ~50% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Forge your own path in Hollow Knight! An epic action adventure through a vast ruined kingdom of insects and heroes. Explore twisting caverns, battle tainted creatures and befriend bizarre bugs, all in a classic, hand-drawn 2D style.

    2017ActionIndieAdventure14.99 USDDeck VerifiedSteam ↗
  5. People Playground

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space.

    2019ActionIndieSimulation9.99 USDDeck PlayableSteam ↗
  6. Portal 2

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

    2011ActionAdventure9.99 USDDeck VerifiedSteam ↗
  7. Fallout: New Vegas

    WHY THIS

    Priced ~67% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    Welcome to Vegas. New Vegas. Enjoy your stay!

    2010ActionRPG9.99 USDDeck PlayableSteam ↗
  8. The Binding of Isaac: Rebirth

    WHY THIS

    Priced ~50% under Undefined Survivors -アンディファインド サバイバーズ- on Steam right now. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    The Binding of Isaac: Rebirth is a randomly generated action RPG shooter with heavy Rogue-like elements. Following Isaac on his journey players will find bizarre treasures that change Isaac’s form giving him super human abilities and enabling him to fight off droves of mysterious creatures, discover secrets and fight his way to safety.

    2014Action14.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.

    2024ActionIndieAdventureFreeDeck PlayableSteam ↗
  2. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗
  3. The Expendabros

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

    2014ActionIndieAdventureFreeDeck VerifiedSteam ↗
  4. UNBEATABLE [white label]

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.

    2021ActionIndieAdventureFreeDeck PlayableSteam ↗
  5. 93, Kuindzhi

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Kuindzhi, 93 is an atmospheric first-person narrative vignette about an 18-year-old boy from Donbas. The story takes us to March 2022, when the world changed forever — into a space where the past, fears, and doubts find their voice.

    2026IndieAdventureFree To PlayFreeSteam ↗
  6. DORONKO WANKO

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    『DORONKO WANKO』 is a DORONKO Action Game. In this game, You can become a cute, innocent Pomeranian, make your master's home messy and dirty. "Will the master be angry with me?" Don't worry. Because you are a sweet doggie.

    2024ActionSimulationFree To PlayFreeSteam ↗
  7. Hello Neighbor Alpha 2

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Adventure with Undefined Survivors -アンディファインド サバイバーズ-.

    Welcome to Alpha 2 of Hello Neighbor. Play against an advanced, self-learning AI in what eventually became Act 1 of Hello Neighbor - the stealth horror home invasion sim.

    2019StrategyIndieAdventureFreeSteam ↗
  8. Crime Scene Cleaner: Prologue

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Undefined Survivors -アンディファインド サバイバーズ-.

    When there’s a call, you are the man to clean up after your client’s dirty job. Siding with the mafia is a dangerous game, but they pay well, and you need money, right? So take your mop and better remove those bloodstains quickly before the police come.

    2024ActionSimulationFreeSteam ↗

Frequently asked about Undefined Survivors -アンディファインド サバイバーズ-

How much does Undefined Survivors -アンディファインド サバイバーズ- cost?
Undefined Survivors -アンディファインド サバイバーズ- is listed on Steam at 29.99 USD (current store price; Steam sales may reduce this temporarily).
Does Undefined Survivors -アンディファインド サバイバーズ- have multiplayer or co-op?
Yes — Undefined Survivors -アンディファインド サバイバーズ- supports multi-player play according to its Steam store listing (Multi-player, Online Co-op, Co-op).
What games are most similar to Undefined Survivors -アンディファインド サバイバーズ-?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Undefined Survivors -アンディファインド サバイバーズ- are Runi, Island Raft Survival 2021: Ocean Escape, Sundermead.
Who developed Undefined Survivors -アンディファインド サバイバーズ-?
Undefined Survivors -アンディファインド サバイバーズ- was developed by Runpath Inc..

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Undefined Survivors -アンディファインド サバイバーズ-.

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