Co-op games like Monster Master
Below are 8 cooperative Steam games similar to Monster Master, 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 Monster Master page.
Ranked picks
- 1
Inheritors2078
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Strategy with Monster Master.
Inheritors 2078 is an RTS/TPS/FPS hybrid game with full Multiplayer & Co-op support, taking its events in the near future where the world is being dominated by evil robotic incarnates that were once enslaved by humans.
- 2
Jonas Willy Online
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Indie with Monster Master.
Online third-person shooter (TPS) up to 20 players.
- 3
Zombie Wasteland Together
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Indie with Monster Master.
Zombie Wasteland Together is a 1–4 player co-op zombie shooter set in a post-apocalyptic desert. Team up with friends, fight endless hordes of infected, and survive using powerful weapons.
- 4
HUNGER
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Early Access with Monster Master.
HUNGER throws you into the chaos of plague-ravaged Napoleonic Europe. This multiplayer extraction RPG blends brutal melee and ranged combat with deep long term character progression, questing and crafting. Scavenge for resources, battle unspeakable horrors, and outlast rival Living.
- 5
Gravebound
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Early Access with Monster Master.
Gravebound is a 6-player co-op extraction shooter set in a post-apocalyptic world overrun by rogue machines. Scavenge valuable loot, survive intense firefights, complete dynamic objectives, and extract alive to keep what you earn. Push deeper for rarer rewards, tougher enemies, and higher stakes.
- 6
Counter Attack
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Early Access with Monster Master.
Counter Attack is a defense-based first-person shooter where you progress through story-driven missions and fend off incoming enemies.
- 7
Operation: Black Genesis - The Immortal Trials
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Early Access with Monster Master.
top-down co-op survival horror game where players deploy into deadly Quarantined Zones, fight mutated experiments, and extract with everything you can carry—because if you die, you lose it all.
- 8
Suds
Online Co-op alternative to Monster Master — playable with friends. Shares Action and Strategy with Monster Master.
Grab your friends and defend the Suds' village! Fight endless waves of slimes, save infected teammates, and compete for the top spot on the leaderboards. A cute and chaotic adventure awaits!