Single-player games like Diabolus
Below are 8 single-player Steam games similar to Diabolus, 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 Diabolus page.
Ranked picks
- 1
Abyss Deck
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
A deckbuilding auto-battler roguelike.Build your team, shape your deck, and survive through random events and shifting rules.Every outcome depends on your decisions before battle.
- 2
Silent Mainland
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
Silent Mainland is a roguelike deckbuilder based on movement and grid mechanics. Players engage in tactical battles on a vast 5x12 battlefield. Facing waves of oncoming monsters, use card-driven movement and positional control to defeat foes in dynamic formations.
- 3
ON&OFF
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
ON&OFF is a turn-based strategy game where you manipulate pieces on a grid to trigger explosive chain reactions. Toggle pieces ON to attack, defend, and heal. Read the enemy's telegraphed intents, unleash powerful skills, and master the board to survive!
- 4
Kingdom of Ashes - Fallen Era
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
A single-player roguelike deck-builder set in a fallen kingdom. Draft cards, chain elemental resonances, fight through procedural maps of battles, shrines, and bosses. Spend Ash at the Forge for permanent upgrades. Eight heroes, brutal Ascension tiers.
- 5
Husk Protocol
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
ATTENTION! HUSK PROTOCOL INITIATED! Prepare to engage in a challenging deck-driven mecha game. Synergise between powerful Husks, utilise a dynamic deck and avoid detection from the city’s mainframe as you infiltrate the machine-driven brutopolis of Aeterna.
- 6
Pirates Outlaws 2: Heritage
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
Pirates Outlaws 2 is a swashbuckling roguelike deckbuilder. Collect & fuse cards, gather powerful relics and adapt your strategy during each run. Become a reputed pirate, loot the Sea Masters, challenge giant creatures and triumph in the great Arena!
- 7
Touhou Rinrinki ~ Crafts of the Lucky Beast
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
Touhou Rinrinki ~ Crafts of the Luck Beast is a Touhou Doujin Card-Strategy Game. Using cards across different seasons, join forces with duelists of unique abilities, face various opponents from all over Gensoukyo, and uncover the truth behind the Card Duel Incident!
- 8
As We Descend
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
The apocalyptic roguelike deckbuilder with squad sculpting and deep tactics. Recruit the right units and outmaneuver titanic foes on dangerous expeditions. Build up allies and resources in the feudal Vault-City. Can you survive all the perils that await the last bastion of humanity?