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
Cloudsphere
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy with Diabolus.
A roguelike deckbuilder where your ship is your deck. Build modular sky-vessels block by block - every module adds a card to your deck! Chase outrageous builds, push overclocks to the limit, conquer the cloud world, and take revenge on the leviathan that destroyed your home.
- 3
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.
- 4
Montabi
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
Tame, collect, fight! Assemble an unstoppable team of unique Montabi in this Creature-Collector Roguelike Deckbuilder. Master their awesome abilities, synergize their strategic strengths and save the city in tactical turn-based combat!
- 5
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!
- 6
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!
- 7
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?
- 8
Floppy Knights
Single-player alternative to Diabolus — playable solo, no multiplayer required. Shares Strategy and Indie with Diabolus.
Meet the Floppy Knights: tangible projections summoned from floppy disks! Tactics fuse with card game mechanics as Phoebe and Carlton, a brilliant young inventor & her robot-arm bestie, square off in turn-based battles. Select your Knights, hone your deck, and execute your strategy for victory!