Co-op games like HorrorBox
Below are 5 cooperative Steam games similar to HorrorBox, 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 HorrorBox page.
Ranked picks
- 1
Monstrum 2 Beta
Online Co-op alternative to HorrorBox — playable with friends. Shares Indie and Early Access with HorrorBox.
Monstrum 2 is a survival horror game for 2-5 players, set inside the procedurally-generated sea labyrinth - Sparrowlock. Join a team of prisoners evading the terrors within whilst figuring out how to escape, or become one of the deadly monstrosities whose only goal is to hunt them down.
- 2
灵魂筹码:契约
Online Co-op alternative to HorrorBox — playable with friends. Shares Indie and Early Access with HorrorBox.
《灵魂筹码:契约》是一款生存恐怖对战游戏。这是一场一旦坐上牌桌便无法回头的赌局，为了取胜所要付出的代价远超想象，你需要通过合作才能逃离这越陷越深的泥潭。不过要小心，你将面对的敌人并不只有恶灵，而你要合作的也不仅仅是人类同伴……
- 3
SCP: Breakout
Online Co-op alternative to HorrorBox — playable with friends.
SCP: Breakout is a survival horror game set in the world of the SCP Foundation, In the game, you play as a Class-D a prisoner of the Foundation who has been given an extremely rare and lucky chance to break free from your cell escape a secret facility. your chances aren't looking very good...
- 4
There Won't be Light
Online Co-op alternative to HorrorBox — playable with friends. Shares Indie and Early Access with HorrorBox.
Escape the terror lurking in the darkness in this immersive co-op experience. Solve challenges and work as a team using your main tool: your voice. Beware of lurking monsters, which might be closer than you expect.
- 5
HOUND: AUTOMATON
Online Co-op alternative to HorrorBox — playable with friends.
In this hyper-realistic multiplayer horror game, one player starts as The Hound, while up to 15 players are human survivors trying to hide. Navigate through hyper-realistic environments, and experience the ultimate survival horror experience in multiplayer.