Co-op games like Sanitism
Below are 8 cooperative Steam games similar to Sanitism, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Sanitism page.
Ranked picks
- 1
Guillotine
Online Co-op alternative to Sanitism — playable with friends. Shares Indie with Sanitism.
Guillotine is a multiplayer game of social deduction, with a pinch of survival. You're in a tavern in the woods, but someone is a necromorph hungry for human meat. Guillotine the necromorph, or get eaten alive.
- 2
Sincognito
Online Co-op alternative to Sanitism — playable with friends. Shares Strategy and Indie with Sanitism.
An social deduction investigation horror game where one of you is secretly possessed by a Deadly Sin. Use stealth and proximity chat to cooperate or deceive as you gather clues and compare findings to deduce which Sin is haunting the castle.
- 3
Castle of Mist
Online Co-op alternative to Sanitism — playable with friends. Shares Strategy and Indie with Sanitism.
Castle of Mist is a first-person shooter with Roguelike random elements set in a medieval-style adventure. Players control different characters, choose various items to create unique playstyles, and ultimately defeat various monsters and the dragon attacking the castle to achieve victory.
- 4
Bloodbound: Vampire Hunters
Online Co-op alternative to Sanitism — playable with friends. Shares Strategy and Indie with Sanitism.
Bloodbound is a Vampire, Vampire Slayer multiplayer first-person action shooter. Locations are varied and detailed, and each character comes with its own unique weapons and special abilities. Pick a side, squad up, and master a rising roster of fearless characters in this fast-paced bloody FPS.
- 5
Modiverse
Online Co-op alternative to Sanitism — playable with friends. Shares Strategy and Indie with Sanitism.
An open multiplayer sandbox game; includes tools, props, levels, NPCs, character models, game-modes and much more! Make your own using our mod kit!
- 6
Buried Whispers
Online Co-op alternative to Sanitism — playable with friends.
A chaotic social deduction game for up to 10 players. Collaborate to complete a demonic ritual, but be careful: secret moles among you are trying to prevent it. Anyone can kill anyone, sacrifice your health to cast multiple votes, and dig tunnels inside fully destructible, randomly generated caves.
- 7
DotStrike
Online Co-op alternative to Sanitism — playable with friends. Shares Indie and Early Access with Sanitism.
DotStrike is a 3D online shooter in which alien invaders in the form of colored spheres fight each other in a seaport. But the aliens are not fighting alone.
- 8
Cyberless: Online
Online Co-op alternative to Sanitism — playable with friends. Shares Strategy and Indie with Sanitism.
Cyberless: Online," a multiplayer, FPS, and Sci-Fi game, presents the government warfare between two factions, Forces and Rebels. While Rebels argue that elections are rigged, Forces hold the power. Engage in the battle to contribute to the storyline of the Cyberless game series!