IMHO.

Single-player games like Windowkill

Below are 12 single-player Steam games similar to Windowkill, 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 Windowkill page.

Ranked picks

  1. 1
    GunDeck[100] — Steam game cover

    GunDeck[100]

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

    GunDeck[100] is a lightning-fast twin-stick shooter where you’ll build your arsenal from randomly-dealt cards. Weapons fire in a rainbow of elements with unique effects. Dart and dodge to survive the fireworks unleashed against you, and retaliate with your own display! Can YOU survive to wave 100?

    2023ActionIndie4.99 USDDeck VerifiedSingle-playerSimilar games →
  2. 2
    Red Zirion — Steam game cover

    Red Zirion

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

    Red Zirion is a retro shooting game with upgradeable attributes in the roguelike style. Game inspired by groups of heroes and animated series from the 80s.

    2020ActionIndieCasual1.49 USDSingle-playerSimilar games →
  3. 3
    Scrappage — Steam game cover

    Scrappage

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

    In this unforgiving rogue-lite twin stick shooter, death awaits you behind every corner. Fight your way through hordes of monsters, eliminate bosses and loot their valuable items and body parts. With them you can enhance your own body, unlock powerful skills and create your own unique builds.

    2023ActionIndie4.99 USDSingle-playerSimilar games →
  4. 4
    Uber Destruction — Steam game cover

    Uber Destruction

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

    Uber Destruction is a side-scrolling roguelike top-down shooter. loot chests, gather insane weapons and unique upgrades to battle the relentless hoards of foes. You can also embrace the action online with friends, or in local co-op mode. Destroy your way to victory!

    2024ActionIndieAdventure1.99 USDSingle-playerSimilar games →
  5. 5
    Rocket! — Steam game cover

    Rocket!

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

    Destroy enemy ships, blast away asteroids and unlock new weapons / ship abilities in this endless arcade roguelite. Earn resources through each of the 7 game modes to upgrade your weapons to outlast them all.

    2024ActionStrategyIndie9.99 USDSingle-playerSimilar games →
  6. 6
    Geometry Rift — Steam game cover

    Geometry Rift

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

    Imagine the frenetic chaos of Geometry Wars colliding with the addictive progression of Vampire Survivors. That's Geometry Rift — a relentless auto-fire action experience where geometric enemies flood the screen and your only option is to shoot, dodge, and survive.

    2026ActionSingle-playerSimilar games →
  7. 7
    Danger Scavenger — Steam game cover

    Danger Scavenger

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

    Danger Scavenger is fast-paced action, cyberpunk-themed, roguelite skyline crawler. Blow up, cut, shoot enemy robots on the roofs of skyscrapers. Choose your way to higher levels, loot, buy stuff, upgrade yourself, fight against greedy corporations, be a rebel!

    2021ActionIndie1.24 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Patch Quest — Steam game cover

    Patch Quest

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

    In a labyrinth surrounded by vicious monsters, Explorers must rely on their Lasso to survive! Capture and tame ANY monster to leap, glide, surf, tunnel and websling through a treacherous, patchwork maze. This roguelike/metroidvania seems cute, but it’s a deceptively difficult bullet-hell challenge!

    2023ActionIndieAdventure2.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Terraria — Steam game cover

    Terraria

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

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

    2011ActionIndieAdventure9.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    ULTRAKILL — Steam game cover

    ULTRAKILL

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

    ULTRAKILL is a fast-paced ultra-violent retro FPS that combines the skill-based style scoring of character action games with the unadulterated carnage inspired by the best shooters of the '90s. Rip apart your foes with varied destructive weaponry and shower in their blood to regain your health.

    2020ActionIndieEarly Access24.99 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    10mg :) — Steam game cover

    10mg :)

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

    Play a series of tiny games based on well-known classics, each with a unique twist and connected to each other. Race cars, hit golf balls, uncover mines, and more in this experimental action/puzzle game.

    2020ActionIndieCasual2.99 USDSingle-playerSimilar games →
  12. 12
    Heck Deck — Steam game cover

    Heck Deck

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

    Heck Deck is a bullet hell card game where all the bullets are cards and time only progresses as you move. Explore 5 stages full of unique enemies and bosses, discover dozens of cards, and visit shops to buy and sell cards for health!

    2022Indie3.99 USDSingle-playerSimilar games →