Co-op games like Species: Unknown
Below are 9 cooperative Steam games similar to Species: Unknown, 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 Species: Unknown page.
Ranked picks
- 1
Nuclear Nightmare
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
Venture forth as part of a specialized team of fellow players tasked with retrieving classified materials, evading the black goo virus, and the nightmarish entities it has spawned. With time running out before the US government initiates a devastating nuclear strike to contain the spreading menace.
- 2
Zombiefield
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
New Zombiefield contractors! Your mission is to open portals to attract tougher zombies and evacuate before the missile strike. Work together with your manager to reduce risks and get paid for completing your contract
- 3
InfestStation
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
INFESTSTATION is a multiplayer Sci-Fi horror game. Board danger-filled abandoned space craft, work together to complete objectives, and sever the dimensional gateways that have allowed horrifying threats to take over and infest these now derelict spaces.
- 4
Backrooms: The Others
Online Co-op alternative to Species: Unknown — playable with friends. Shares Indie and Early Access with Species: Unknown.
Backrooms: The Others is a cooperative horror game for up to 4 players where you will be forced to explore these unknown nooks and crannies, trying to survive in this complex world where death can be waiting for you at every turn!
- 5
Backrooms: The Next Level
Online Co-op alternative to Species: Unknown — playable with friends. Shares Indie and Early Access with Species: Unknown.
Backrooms: The Next Level is a Co-op horror game up to 4 players, where you and your friends will explore the game, try to pass the game level using your mind, wit, remembering the places where you were
- 6
Lethal Company
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
A co-op horror about scavenging at abandoned moons to sell scrap to the Company.
- 7
GTFO
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action with Species: Unknown.
GTFO is a hardcore cooperative horror shooter that throws you from gripping suspense to explosive action in a heartbeat. Stealth, strategy, and teamwork are necessary to survive in your deadly, underground prison. Work together or die together.
- 8
EXOME
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
EXOME is a co-op sci-fi survival shooter that blends wave-based survival with open-world exploration. Battle hordes of aliens, upgrade your arsenal, and uncover the hidden truths of the deep forest. Will you face it alone or bring your friends along?
- 9
Ready or Not
Online Co-op alternative to Species: Unknown — playable with friends. Shares Action and Indie with Species: Unknown.
Ready or Not is an intense, tactical, first-person shooter that depicts a modern-day world in which SWAT police units are called to defuse hostile and confronting situations.