Co-op games like Castle of Mist
Below are 8 cooperative Steam games similar to Castle of Mist, 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 Castle of Mist page.
Ranked picks
- 1
Sinister Night 2
Online Co-op alternative to Castle of Mist — playable with friends. Shares Action and Strategy with Castle of Mist.
Nine Streamers enter an ancient Chinese mansion, hoping to attract a huge following and become famous through livestreaming. However, two of them are tragically possessed by evil spirits. These possessed will slaughter their companions, and complete a malevolent ritual of a ghostly wedding.
- 2
Catolonizer
Online Co-op alternative to Castle of Mist — playable with friends. Shares Strategy and Indie with Castle of Mist.
Catolonizer is an online social deduction game for up to 15 players. Complete tasks to earn coins, buy items from the Merchant, and use your secret ability at night. Outsmart the others and fulfill your unique win condition!
- 3
Warrior Architects
LAN Co-op alternative to Castle of Mist — playable with friends. Shares Strategy and Indie with Castle of Mist.
The game's story follows the grand adventures of warriors who encounter various villages and tribes. Collaborating with these tribes, they transform small villages into large fortresses, building defenses to repel external attacks. Their efforts earn the trust of the people.
- 4
Sincognito
Online Co-op alternative to Castle of Mist — playable with friends. Shares Action and Strategy with Castle of Mist.
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.
- 5
Guillotine
Online Co-op alternative to Castle of Mist — playable with friends. Shares Indie and Adventure with Castle of Mist.
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.
- 6
MindHunt
Online Co-op alternative to Castle of Mist — playable with friends. Shares Strategy and Indie with Castle of Mist.
MindHunt is a solo/multiplayer detective like game (1-10 players), where you as an agent try to find out which androids are infected in order to shut them down! Well, if you are the infected one, you better blend with other androids and complete all tasks necessary!
- 7
Mage Mayhem
Online Co-op alternative to Castle of Mist — playable with friends. Shares Action and Strategy with Castle of Mist.
Mage Mayhem is a roguelike featuring unique magic with hundreds of different styles to explore. Customize your experience through a variety of abilities and upgrades. Enjoy alongside your friends, then battle them in various other PvP game modes.
- 8
Alterum
Online Co-op alternative to Castle of Mist — playable with friends. Shares Action and Indie with Castle of Mist.
Social deduction horror game with voice recognition, full of betrayal and dark rituals. Awaken in a cult of restless souls: spells spoken aloud summon powers - or doom. Alliances or deceit: can you distinguish truth when a word is a curse?