Single-player games like Demons Happened
Below are 8 single-player Steam games similar to Demons Happened, 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 Demons Happened page.
Ranked picks
- 1

Memorise'n'run
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
Challenge your ability, your reflexes and your memory to avoid from the shots while you solve a memory game, because in Memorise'n'Run you need to memorize the cards while survive of a real bullet hell.
- 2

Action Commando
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
As a time travelling Spartan Soldier, you must stop the Cult of the Fallen Gods that are turning people into burger meat. Grab your sword and assault cannon and deal death to these disfigured freaks in the name of humanity.
- 3

Polyfury
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
You thought geometry was difficult? Now it's got a gun! Face the fury of the Seven Deadly Shapes and blast your way through a barrage of bullets and lasers in this highly accessible bullet hell.
- 4

Eclipse: Shine of Dawn
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
The true darkness approaches Absalom, and through the hands of Luke, you will wield the true power capable of cutting it at its roots while seeking to rescue Prince Nylo. Evolve the power of the Suncatcher sword and legendary weapons to face hordes of creatures, iconic puzzles, and bosses.
- 5

Crosstown
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action with Demons Happened.
An overload of 8-bit-style action mayhem, Crosstown hands you a toga and a gun, and lets you loose in an ever-changing maze full of monsters and explosions! 40 levels, up to 4 players, and an endless mode!
- 6

Nuclear Throne
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter. Not 'the final hope of humanity' post-apocalyptic, but 'humanity is extinct and mutants and monsters now roam the world' post-apocalyptic. Can you reach the Nuclear Throne?
- 7

The Devil Within: Satgat
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
Join Kim Rip, a Royal Guard whose humanity is gradually slipping away, on a thrilling 2.5D action-adventure platforming journey in 'The Devil Within: Satgat'. Uncover the mysteries of a desolate realm as you engage in stylish battles against formidable foes.
- 8

Schism
Single-player alternative to Demons Happened — playable solo, no multiplayer required. Shares Action and Indie with Demons Happened.
Schism is a challenging action roguelike RPG with deep synergies and high broken build potential. The combination of robust stat systems, fully moddable guns, deity worship, intense frequency-switching bullet hell combat, and difficult bosses make for a unique and highly replayable experience.