IMHO.

Single-player games like Project Delta

Below are 9 single-player Steam games similar to Project Delta, 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 Delta page.

Ranked picks

  1. 1
    Trash Quest — Steam game cover

    Trash Quest

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

    Trash Quest is a compact metroidvania with a single spawn point, run and gun action and tight platforming. Navigate an interwoven maze of rooms through this space station, destroying robots, collecting power ups and unlocking shortcuts.

    2021ActionIndieAdventure2.99 USDSingle-playerSimilar games →
  2. 2
    Kalinur — Steam game cover

    Kalinur

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

    Defeat the mage Kalinur and bring peace back to the kingdom in this mini metroidvania with a lot of action.

    2022ActionIndie1.99 USDSingle-playerSimilar games →
  3. 3
    Astalon: Tears of the Earth — Steam game cover

    Astalon: Tears of the Earth

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

    Uphold your pact with the Titan of Death, Epimetheus! Fight, climb and solve your way through a twisted tower as three unique adventurers, on a mission to save their village from impending doom!

    2021ActionAdventure19.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    Timespinner — Steam game cover

    Timespinner

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

    Travel back in time to change fate itself, in this beautifully crafted story-driven adventure, inspired by classic 90s action-platformers. Join timekeeper Lunais on her quest for revenge against the empire that killed her family, using time-bending powers to explore a vast, connected world.

    2018ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    Alwa's Legacy — Steam game cover

    Alwa's Legacy

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

    Alwa’s Legacy is a modern retro game full of dangerous dungeons, mystic items and ancient secrets. Upgrade your magic and choose your own path in this non-linear adventure game brimming with exploration.

    2020ActionIndieAdventure17.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    Chasm — Steam game cover

    Chasm

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

    Explore the depths below a remote mountain town in this procedurally-generated Adventure Platformer. Taking inspiration from hack 'n slash dungeon crawlers and Metroidvania-style platformers, Chasm will immerse you in a fantasy world full of exciting treasure, deadly enemies, and abundant secrets.

    2018ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    Axiom Verge — Steam game cover

    Axiom Verge

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

    Explore and uncover the mystery of a surreal alien world by blasting aliens and glitching your environment in this intense retro side-scrolling action/adventure.

    2015ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Gato Roboto — Steam game cover

    Gato Roboto

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

    Pounce inside of your cozy armored mech and set off on a dangerous trek through an alien underworld full of irritable creatures and treacherous obstacles in a valiant effort to save your stranded captain and his crashed spaceship.

    2019ActionIndieAdventure7.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Destroy Space Aliens — Steam game cover

    Destroy Space Aliens

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

    Challenge yourself and enter the castle of the Legendary Sir Frank Jones V to destroy invading space aliens! Slash, blast, and dash your way to victory in this retro side-scrolling action/adventure.

    2017ActionIndieAdventure3.99 USDSingle-playerSimilar games →