IMHO.

Single-player games like Alterhavoc

Below are 8 single-player Steam games similar to Alterhavoc, 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 Alterhavoc page.

Ranked picks

  1. 1
    Kuiper Belt Survivor — Steam game cover

    Kuiper Belt Survivor

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

    Kuiper belt survivor is an arcade style bullet heaven, where every run is endless. It brings a unique spin to the bullet heaven genre by making every part of the players weapon arsenal customizable with well over 10,000 unique weapons to build, and unique stats for every enemy.

    2024ActionStrategyIndie9.99 USDSingle-playerSimilar games →
  2. 2
    Necromorphosis — Steam game cover

    Necromorphosis

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

    In this unliving hell, become the bullet heaven. Gather the bones of fallen foes and morph into the ultimate skeleton to claim your throne of skulls as King of the Undead, if you can survive the Necromorphosis.

    2024ActionIndieEarly Access4.99 USDSingle-playerSimilar games →
  3. 3
    Duriano — Steam game cover

    Duriano

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

    Duriano is a top-down arena shooting Slasher roguelite game where the player will be a hero durian of the norse wielding a weapon to fight upon a god of norse mythology. From different weapons, Durian hero, God’s trail, items will lead the player to create a build and defeat all gods of asgard.

    2025ActionStrategyIndie12.99 USDSingle-playerSimilar games →
  4. 4
    Spell Defender — Steam game cover

    Spell Defender

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

    Spell Defender is a 3D, Third-Person, wave defence, survival Roguelite. Use magical powers to defeat waves of enemies. Each wave rewards you with a choice of a new power. Find synergies and combine these powers to create the ultimate defender.

    2022ActionIndie2.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    God Of Weapons — Steam game cover

    God Of Weapons

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

    Embark on a thrilling journey in God of Weapons, an action roguelike where you must ascend the tower of Zhor to reclaim the last light for the world. To survive the monster onslaught on each tower's level, you'll need to obtain and carefully organize weapons and accessories in your inventory.

    2023ActionIndieRPG5.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Touhou: Gensokyo Survivors — Steam game cover

    Touhou: Gensokyo Survivors

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

    Youkai have overrun Gensokyo! There's no resolving this incident, just try to survive! Touhou: Gensokyo Survivors is the latest take on the survivor genre, this time with the unique twist of a grid-based inventory system. Hoard as many items as possible if you want to survive!

    2023ActionIndieCasual0.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Spell Disk — Steam game cover

    Spell Disk

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

    Build unique synergy spell combos to destroy the hordes of monsters and bosses in this rogue-lite action game.

    2024ActionIndie14.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Dungeon Survivors — Steam game cover

    Dungeon Survivors

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

    Dungeon Survivors is a top-down fantasy roguelite where you can use your class abilities to fight off a horde of fantasy monsters. Choose from a variety of abilities and items to create unique builds and survive with 1-4 players.

    2024ActionIndieRPG4.99 USDDeck PlayableSingle-playerSimilar games →