IMHO.

Single-player games like BioGun

Below are 16 single-player Steam games similar to BioGun, 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 BioGun page.

Ranked picks

  1. 1
    Blast Hopper — Steam game cover

    Blast Hopper

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    This adventure pits a lone explorer against the dangers of a strange underground world while blending classic 2D platforming with heart-pounding twin-stick shooting. Embrace the fun and excitement as you jump, shoot, and dash your way through to restore the severed link to the surface

    2025ActionIndieAdventure5.99 USDSingle-playerSimilar games →
  2. 2
    The Knight Witch — Steam game cover

    The Knight Witch

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    The Knight Witch is a metroidvania adventure game with fast-paced, shoot 'em up combat set in a beautifully hand-drawn world. Cast devastating card-based spells, forge close bonds, and make moral choices all in your quest to save your home and discover who's behind the War Golem invasion.

    2022ActionIndieAdventure3.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Clinical Trial — Steam game cover

    Clinical Trial

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Prologue version of the game BioGun.Get injected into the microscopic world. Face viral threats and winding corridors on your mission to save man’s best friend from the inside. Will you be the vaccine to save dog-kind from extinction?

    2024ActionIndieAdventureFreeDeck PlayableSingle-playerSimilar games →
  4. 4
    末代侠客 — Steam game cover

    末代侠客

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    个人独立开发的像素武侠风横版动作游戏,以电子游戏的形式为大家展示在南宋末年蒙古入侵中原、江湖没落、大侠绝迹的背景下,怀有侠义之心的剑客贯彻心中理念的故事。

    2021ActionIndieAdventure3.99 USDSingle-playerSimilar games →
  5. 5
    The Mobius Machine — Steam game cover

    The Mobius Machine

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Discover a vast alien world. Fight the ferocious local fauna and killer machines. Reveal its secrets and find a way to escape. The Mobius Machine is a side-scroller action adventure, with an emphasis on free-form exploration and intense combat.

    2024ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    8Doors: Arum's Afterlife Adventure — Steam game cover

    8Doors: Arum's Afterlife Adventure

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    8Doors is a story-driven Metroidvania-style action platformer heavily influenced by Korean folktales. Play as ‘Arum’, a brave girl that has entered the realm of the afterlife in search of her father’s soul and guide her through the '8 Doors of Purgatory' to solve the mysteries that lie deep within.

    2021ActionIndieAdventure3.99 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    Bookbound Brigade — Steam game cover

    Bookbound Brigade

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Bookbound Brigade is about beating the hell out of historical and literary characters you studied in school by leading a dream team of real and fictional heroes through a 2D side-scrolling platform-adventure.

    2020ActionIndieAdventure19.99 USDSingle-playerSimilar games →
  8. 8
    BIOMORPH — Steam game cover

    BIOMORPH

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Adventure with BioGun.

    BIOMORPH is a dark metroidvania game where you become the creatures that you kill! Solve ingenious puzzles and navigate a stunning hand-drawn world. Meet quirky characters, rebuild a city, and uncover the secrets of a sprawling, fallen civilization… and of your own mysterious origins.

    2024ActionAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Prince of Persia The Lost Crown — Steam game cover

    Prince of Persia The Lost Crown

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Adventure with BioGun.

    Dash into a stylish and thrilling action-adventure platformer set in a mythological Persian world where the boundaries of time and space are yours to manipulate.

    2024ActionAdventure29.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Mighty No. 9 — Steam game cover

    Mighty No. 9

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action with BioGun.

    Mighty No. 9 is a 2D Side-scrolling Action game that takes the best elements from 8 and 16-bit classics that you know and love and transforms them with modern tech, fresh mechanics, and fan input into something fresh and amazing!

    2016Action19.99 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    Hollow Knight — Steam game cover

    Hollow Knight

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    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 VerifiedSingle-playerSimilar games →
  12. 12
    Ori and the Blind Forest — Steam game cover

    Ori and the Blind Forest

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action with BioGun.

    “Ori and the Blind Forest” tells the tale of a young orphan destined for heroics, through a visually stunning action-platformer crafted by Moon Studios for PC.

    2015ActionDeck VerifiedSingle-playerSimilar games →
  13. 13
    Pronty — Steam game cover

    Pronty

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Guide Pronty and its Javelin partner Bront as it defends the once great city of Royla. Explore the deep sea, fight mutant sea creatures, and discover the secrets behind this new Atlantis in this beautiful action-packed adventure.

    2021ActionIndieAdventure17.99 USDDeck VerifiedSingle-playerSimilar games →
  14. 14
    Laika: Aged Through Blood — Steam game cover

    Laika: Aged Through Blood

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Adventure with BioGun.

    Laika: Aged Through Blood is an action-adventure Metroidvania set in a post-apocalyptic western world. Play as Laika, a coyote mother and fierce warrior, and carve your motorbike through a land ravaged by betrayal and loss as you uncover dark secrets in the pursuit of vengeance against oppression.

    2023ActionAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  15. 15
    Hollow Knight: Silksong — Steam game cover

    Hollow Knight: Silksong

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Discover a vast, haunted kingdom in Hollow Knight: Silksong! Explore, fight and survive as you ascend to the peak of a land ruled by silk and song.

    2025ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  16. 16
    TurnBreak — Steam game cover

    TurnBreak

    Single-player alternative to BioGun — playable solo, no multiplayer required. Shares Action and Indie with BioGun.

    Bend the rules. Break your opponents. Outsmart the League before it crushes you. Forge unstoppable teams of evolving Beasts, then exploit elemental weaknesses to chain devastating plays. Every battle is a high-stakes mind game. Will you rise through the ranks or be broken in the attempt?

    2025ActionStrategyIndie7.99 USDSingle-playerSimilar games →