


- 4players
- 30–90 min
- PC
Valve's free top-down squad shooter: four marines with distinct classes fight through an alien-infested colony.
Who can play
- No split-screen on any platform.
- Online for up to 4 players on PC.
- Free to play.
How it plays
Each of the four players takes a class, such as officer, medic, tech or special weapons, and missions need all of them: the tech hacks doors, the medic keeps everyone alive and friendly fire punishes careless shooting.
It is free on Steam, so nobody has to buy anything.
The free community expansion Alien SwarmReactive Drop, a separate download, continues it with more missions and room for larger groups.
Is it good
94%
Very positive on Steam
18 playing on Steam, counted dailySteam Deck Playable
Every way to play together
No split-screen. Online for up to 4 on PC. Free to play. 94% positive of 22,000 Steam reviews.
- 4
Up to four players, one marine each, play the campaign together.
Quick facts
- Developer
- Valve
- Platforms
- PC
- Released
- Jul 19, 2010 on PC
- Languages
- Text in 1 language
In these lists
Answers
- Does Alien Swarm have couch co-op?
- No. Alien Swarm has no same-screen multiplayer; play it together online instead.
- How many players can play Alien Swarm together?
- Online co-op for up to 4 on PC.
- Do you need two copies of Alien Swarm?
- No. It's free to play.
- One of 1,371 co-op games where one copy is enough
- Can you play the Alien Swarm story together?
- Yes: the main campaign is playable together online.
- Does Alien Swarm work on Steam Deck?
- Yes, with some extra steps: Steam rates it Playable for Steam Deck.
- Is Alien Swarm free?
- Yes, it's free to play.












