IMHO.

Games like ONCE / однажды

If ONCE / однажды is your kind of game, the closest matches are 《失调~Dissonance》, Humanity Lost and Exit Error — 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 ONCE / однажды: ONCE / однажды is a first-person adventure game set in an alternative post-Soviet space. As a volunteer, you go to conduct an unscheduled inspection of power plant points.

ActionIndieAdventureEarly AccessWindowsby dipgames
ONCE / однажды — Steam game cover

Players who liked ONCE / однажды also play

Steam players who put hours into ONCE / однажды 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. 《失调~Dissonance》

    WHY THIS

    Top pick for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with ONCE / однажды.

    A fan-made game based on the K-pop group NCT, where you play as different members, carrying out various missions until you uncover the secrets of a hostile organization......

    2026ActionAdventureSteam ↗
  2. Humanity Lost

    WHY THIS

    Second-strongest match for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with ONCE / однажды.

    Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.

    2021ActionAdventureRPG3.99 USDSteam ↗
  3. Exit Error

    WHY THIS

    Third-strongest match for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with ONCE / однажды.

    In this game, if you die, instead of starting over, you move on to the next level. Or something like that.

    2027ActionIndieAdventureSteam ↗
  4. Everlasting Guilt

    WHY THIS

    Ranked #4 for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with ONCE / однажды.

    if you’re into Doom, Furi \ Titan Souls, this game will fulfill your needs with its FPS, fast-paced gameplay that heavily focuses on Boss fights, each with a unique approach that has its own mechanics, and a load of enemies to unleash your anger and test your arsenal upon.

    2021ActionIndieAdventure14.99 USDSteam ↗
  5. Rusty's Day Off: Episode One - Janitor on Duty

    WHY THIS

    Ranked #5 for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with ONCE / однажды.

    Rusty's Day Off is a stylized FPS with puzzle elements in which you play as Rusty, a janitor, facing his own rogue robots. You'll have to fight, solve puzzles, and jump & run all over the place to get through this day.

    2024ActionIndieAdventure14.99 USDSteam ↗
  6. Facility 37

    WHY THIS

    Ranked #6 for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with ONCE / однажды.

    Explore an abandoned research facility, uncover evidence of horrific experiments, and escape alive. Complete randomized objectives with your team while evading bio-engineered threats in this atmospheric co-op horror experience.

    ActionIndieAdventureSteam ↗
  7. METRO 2039

    WHY THIS

    Ranked #7 for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with ONCE / однажды.

    METRO 2039 is the next landmark FPS from acclaimed storytellers, 4A Games. Journey into the dark heart of post-apocalyptic Moscow in a harrowing conflict for the very soul of the Metro.

    2027ActionAdventureSteam ↗
  8. FLEETING ESCAPE

    WHY THIS

    Ranked #8 for ONCE / однажды fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with ONCE / однажды.

    FLEETING ESCAPE is a wave-based survival horror game with an emphasis on player choice. At the end of every wave, the player must escape to a different island to survive. Each island has its own game mode, weapons, loot, upgrades, and enemies that can drastically change gameplay.

    2027ActionIndieSteam ↗

Free alternatives

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

  1. Doki Doki Literature Club!

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with ONCE / однажды.

    The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.

    2017IndieFree To PlayCasualFreeDeck PlayableSteam ↗
  2. Life is Strange - Episode 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with ONCE / однажды.

    Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.

    2015ActionAdventureFreeDeck PlayableSteam ↗
  3. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with ONCE / однажды.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  4. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Adventure with ONCE / однажды.

    Experience surreal environments and inexplicable characters as ENA in a new wild world.

    2025IndieAdventureFreeDeck VerifiedSteam ↗
  5. The Murder of Sonic the Hedgehog

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with ONCE / однажды.

    Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!

    2023IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  6. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with ONCE / однажды.

    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 ↗
  7. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with ONCE / однажды.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  8. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with ONCE / однажды.

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

    2022IndieFreeDeck PlayableSteam ↗

Frequently asked about ONCE / однажды

What games are most similar to ONCE / однажды?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside ONCE / однажды are 《失调~Dissonance》, Humanity Lost, Exit Error.
Who developed ONCE / однажды?
ONCE / однажды was developed by dipgames.

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 ONCE / однажды.

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