IMHO.

Single-player games like Doors of Insanity

Below are 13 single-player Steam games similar to Doors of Insanity, 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 Doors of Insanity page.

Ranked picks

  1. 1
    Roguebook — Steam game cover

    Roguebook

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and Adventure with Doors of Insanity.

    Embrace the challenge of a roguelike deckbuilder with unique mechanics from the developers of Faeria and Richard Garfield, creator of Magic: The Gathering™. Build a team of two heroes, unleash powerful combos and defeat the legends of the Roguebook!

    2021StrategyIndieAdventure24.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Gordian Quest — Steam game cover

    Gordian Quest

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and Adventure with Doors of Insanity.

    An epic deckbuilding RPG inspired by old-school classics like Ultima and D&D, using modern gaming concepts like roguelite elements and turnbased strategic combat. Lead and nurture parties of heroes. Forge bonds and discover new skills among them. Guide them to unravel the curses laid upon the lands.

    2022StrategyIndieAdventure6.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Ancient Gods — Steam game cover

    Ancient Gods

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and RPG with Doors of Insanity.

    Ancient Gods is a fusion of hero collector and deck-building rogue-lite where you collect your character, fight, and experience exciting events. Any character can use all the cards, combine them with the character's passive for ultimate power on your exploration.

    2022StrategyRPG19.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Monster Train — Steam game cover

    Monster Train

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy with Doors of Insanity.

    Monster Train is a strategic roguelike deck building game with a twist. Set on a train to hell, you’ll use tactical decision making to defend multiple vertical battlegrounds. With real time competitive multiplayer and endless replayability, Monster Train is always on time.

    2020Strategy4.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Black Book — Steam game cover

    Black Book

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and Adventure with Doors of Insanity.

    “Black Book” is a dark RPG Adventure, based on Slavic myths, in which you play as a young sorceress. Fight evil forces in card-based battles and explore the world, where humans live alongside mythological creatures.

    2021StrategyIndieAdventure24.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Griftlands — Steam game cover

    Griftlands

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required.

    Griftlands is a deck-building roguelite where you negotiate, fight, steal or otherwise persuade others to get your way. Every decision is important, be it the jobs you take, the friends you make, or the cards you collect.

    2021Indie6.79 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    Cardaclysm — Steam game cover

    Cardaclysm

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and RPG with Doors of Insanity.

    Face the Four Horsemen of the Apocalypse in epic card battles! Cardaclysm: Shards of the Four is a procedurally generated collectible card game mixed with action RPG elements. Collect creature and spell cards throughout your journey and unleash their power if anyone opposes you!

    2021StrategyRPG14.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Banners of Ruin — Steam game cover

    Banners of Ruin

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and RPG with Doors of Insanity.

    Assemble your party. Answer the call. Win the war. Build a deck and fight a series of turn-based combats with up to 6 party characters through the city of Dawn's Point. Each character can unlock a set of unique cards and abilities that can augment your deck in powerful, exciting ways.

    2021StrategyRPG19.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Slay the Spire — Steam game cover

    Slay the Spire

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy with Doors of Insanity.

    We fused card games and roguelikes together to make the best single player deckbuilder we could. Craft a unique deck, encounter bizarre creatures, discover relics of immense power, and Slay the Spire!

    2019StrategyIndie6.24 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Cuphead — Steam game cover

    Cuphead

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required.

    Cuphead is a classic run and gun action game heavily focused on boss battles. Inspired by cartoons of the 1930s, the visuals and audio are painstakingly created with the same techniques of the era, i.e. traditional hand drawn cel animation, watercolor backgrounds, and original jazz recordings.

    2017ActionIndie19.99 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    Vault of the Void — Steam game cover

    Vault of the Void

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy with Doors of Insanity.

    Vault of the Void is a fast-paced roguelike deckbuilder where the power is in your hands. Continuously customise your deck, crafting powerful combos and ingenious strategies. Upgrade your cards with Void Stones, infusing them with new abilities to help defeat the minions of The Void!

    2022StrategyIndie8.99 USDDeck VerifiedSingle-playerSimilar games →
  12. 12
    Blood Servants — Steam game cover

    Blood Servants

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Adventure and RPG with Doors of Insanity.

    Empower through sacrifice! Slash and loot with friends, to unlock new skills, areas, and pets as you slash and loot through mystical dungeon quests!

    2021IndieAdventureMassively MultiplayerSingle-playerSimilar games →
  13. 13
    Doors of Insanity: ReOpened — Steam game cover

    Doors of Insanity: ReOpened

    Single-player alternative to Doors of Insanity — playable solo, no multiplayer required. Shares Strategy and Adventure with Doors of Insanity.

    Gear up, sling cards, roll dice and power through the endless doors of a deeply unhinged Purgatory in Doors of Insanity: ReOpened!

    2025StrategyIndieAdventure12.99 USDDeck PlayableSingle-playerSimilar games →