IMHO.

Single-player games like Ai-(Onic)

Below are 7 single-player Steam games similar to Ai-(Onic), 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 Ai-(Onic) page.

Ranked picks

  1. 1
    s&box — Steam game cover

    s&box

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Strategy with Ai-(Onic).

    Our spiritual successor to Garry's Mod, this is a game creation platform built on the Source 2 engine. Play, create, and share games, explore community creations, and experience endless sandbox fun with powerful modern tools.

    2026ActionSportsStrategy19.99 USDSingle-playerSimilar games →
  2. 2
    DotStrike — Steam game cover

    DotStrike

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Indie with Ai-(Onic).

    DotStrike is a 3D online shooter in which alien invaders in the form of colored spheres fight each other in a seaport. But the aliens are not fighting alone.

    2022ActionIndieMassively Multiplayer7.99 USDSingle-playerSimilar games →
  3. 3
    Quack Attack — Steam game cover

    Quack Attack

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Strategy with Ai-(Onic).

    🚀 Join the Cubic Chaos! Get ready for a wild ride in this 4v4 FPS arena on a cube planet. Choose your animal, collect ducks, and let limbs fly in this cartoon mayhem. With collectible weapons, multiplayer and voice chat, it's a fun carnage at its finest! 🦆💣🎮

    2025ActionStrategyIndie9.99 USDSingle-playerSimilar games →
  4. 4
    Forest — Steam game cover

    Forest

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Indie with Ai-(Onic).

    Forest is a multiplayer first-person shooter with an emphasis on realism. This game has a minimum of casual aspects, you won't see the usual crosshair in the center of the screen, health and ammo counter. Everything is done so that the immersion is maximum

    2025ActionIndieMassively Multiplayer3.99 USDSingle-playerSimilar games →
  5. 5
    Decisive Strike — Steam game cover

    Decisive Strike

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Indie with Ai-(Onic).

    A sci-fi team-based Third Person Shooter where strategy is as important as your reflexes.

    2022ActionIndieEarly Access0.99 USDSingle-playerSimilar games →
  6. 6
    Trianga's Project: Battle Splash 2.0 — Steam game cover

    Trianga's Project: Battle Splash 2.0

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Indie with Ai-(Onic).

    Full-Physics Water FPS/TPS, Class-based Action-packed Arena Shooter, Run & Gun with Rocket Jump, Single/Coop/Multiplayers, Survive Procedural Waves of Enemies, Lots of Game Modes, Endless Challenges and Replayability, with an Anime Beautiful Cast, and More...!

    2023ActionIndieCasual0.99 USDSingle-playerSimilar games →
  7. 7
    Altitude — Steam game cover

    Altitude

    Single-player alternative to Ai-(Onic) — playable solo, no multiplayer required. Shares Action and Strategy with Ai-(Onic).

    Now Available on PC, Mac and Linux!

    2009ActionStrategyIndieFreeSingle-playerSimilar games →