IMHO.

Single-player games like Diabolic

Below are 17 single-player Steam games similar to Diabolic, 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 Diabolic page.

Ranked picks

  1. 1
    Ancient Adventure — Steam game cover

    Ancient Adventure

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

    Evil has taken over the world. Equip your Weapon of Choice and venture forth. Journey out into the world to avenge your predecessors. Survive the hordes of monsters, seek out to extinguish the source of all Evil, so that one day, your people may finally live in peace.

    2026ActionIndieAdventureSingle-playerSimilar games →
  2. 2
    Village of Origins — Steam game cover

    Village of Origins

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

    RPG storytelling and hack-and-slash action, are joined with a retro point and click play style. Command a diverse array of hosts, and engage in fast-paced combat that rewards skill and strategy instead of grinding.

    2025ActionIndieAdventure4.99 USDSingle-playerSimilar games →
  3. 3
    Bounty — Steam game cover

    Bounty

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

    Bounty is a fast-paced and brutal top-down action MMORPG set in a post-apocalyptic world populated by humanoid blobs. As a fresh spawn, all you know about the world around you is what was pre-programmed at your creation. It's up to you to find your way (and your meaning) in this strange world.

    2022ActionIndieAdventureSingle-playerSimilar games →
  4. 4
    Dustward — Steam game cover

    Dustward

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

    Dustward - Survive the post-apocalyptic ruins! Explore the devastated world, fight mutants, build fortifications, and develop your character in the dynamic survival-action Dustward. Play solo or team up with friends (up to 4 players) in co-op mode to face the dangers of the dead world.

    2025ActionIndieAdventure14.99 USDSingle-playerSimilar games →
  5. 5
    Hakimi's Ocean Drift  — Steam game cover

    Hakimi's Ocean Drift

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

    A survival shooter game set at sea, where players must gather supplies, locate hidden shelters, and build rafts to survive. On the ocean surface, you'll need to fish with a rod, diligently collect drifting supplies with hooks, construct rafts, and grow food to stay alive.

    2026ActionIndieAdventureSingle-playerSimilar games →
  6. 6
    Rum & Gun — Steam game cover

    Rum & Gun

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

    Rum & Gun combines fast-paced shooter action with ARPG loot and character building. Journey across the Indian Ocean, uncover the secrets of the Drunken God, and become a legendary pirate captain. You're not on the Caribbean anymore...

    2024ActionIndieAdventure4.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    No Place for Bravery — Steam game cover

    No Place for Bravery

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

    Thorn, an old warrior worn down by decades of vim and violence, roams a world undone in search of his lost daughter. Dodge, parry & cleave your way out of brutal clashes in this 2D top-down action RPG, and discover the bone-chilling tale of Thorn's crusade to make his family whole again.

    2022ActionIndieAdventure19.99 USDSingle-playerSimilar games →
  8. 8
    Stillborn Slayer — Steam game cover

    Stillborn Slayer

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

    Stillborn Slayer is a dark fantasy action roguelike featuring fast-paced hack-and-slash combat, procedural runs, and brutal difficulty in a grim, horror-inspired world.

    2023ActionIndieAdventure4.99 USDSingle-playerSimilar games →
  9. 9
    Diablo® IV — Steam game cover

    Diablo® IV

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

    Join the fight for Sanctuary in Diablo® IV, the ultimate action RPG adventure. Experience the critically acclaimed campaign and new seasonal content.

    2023ActionAdventureMassively Multiplayer49.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Risen Kingdom — Steam game cover

    Risen Kingdom

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

    Risen Kingdom is a real-time strategy game. Build and fortify your settlements to survive and push back armies of the undead.

    2020StrategyIndie0.59 USDDeck PlayableSingle-playerSimilar games →
  11. 11
    The Expedition — Steam game cover

    The Expedition

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

    The Expedition is a turn-based tactical game with an oppressive atmosphere of underground immersion.

    2019StrategyIndieRPG0.99 USDSingle-playerSimilar games →
  12. 12
    Sky Survivors — Steam game cover

    Sky Survivors

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

    Sky Survivors is an arena shooter roguelite. Choose from a variety of skills, unlock unique characters and weapons. Build «stairway to heaven» — a sky tower, each floor of which gives your character a unique bonus. Create your own overpowered build to survive against hordes of monsters!

    2023ActionIndie0.74 USDDeck PlayableSingle-playerSimilar games →
  13. 13
    Block Tower TD — Steam game cover

    Block Tower TD

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

    Block Tower TD is a roguelike tower defense strategy game with interesting innovations. Build a world out of blocks, choose random upgrades to make every run unique.

    2023StrategyIndie4.99 USDDeck VerifiedSingle-playerSimilar games →
  14. 14
    Tiny Battles — Steam game cover

    Tiny Battles

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

    Tiny Battles is a tactical action auto-battler where battles take place automatically in the arena.

    2024StrategyIndieCasual4.99 USDDeck PlayableSingle-playerSimilar games →
  15. 15
    Milky Way TD SURVIVORS AUTOBATTLER RTS — Steam game cover

    Milky Way TD SURVIVORS AUTOBATTLER RTS

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

    Milky Way is a unique mix of Tower Defense, RTS, Auto-Battler and Survivors. Build your base, choose random upgrades and use powerful skills to survive against hordes of enemies.

    2024StrategyIndieCasual1.59 USDSingle-playerSimilar games →
  16. 16
    Block Tower TD 2 — Steam game cover

    Block Tower TD 2

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

    Block Tower TD 2 is a strategic game in the roguelike style with original innovations. Build worlds from blocks, choose random upgrades, each game will be unique.

    2024StrategyIndie1.29 USDSingle-playerSimilar games →
  17. 17
    Cursor Survival — Steam game cover

    Cursor Survival

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

    Prepare for a radical shift in Bullet Hell gameplay! In Cursor Survival, you're not piloting a character - you embody the... CURSOR! Unleash a new, utterly insane way to evade, strike, and endure in a chaotic universe of projectiles and adversaries.

    2025ActionIndieCasual0.79 USDSingle-playerSimilar games →