Series Saga
Alien Swarm
A top-down co-op sci-fi shooter, first released free by Valve in 2010. The stand-alone Reactive Drop version carries it forward.
- 2
- Games here
One series. Every step.
Trace the journey
In release order. Select a game below.
01 of 02
Alien Swarm
Co-operative multiplayer game and complete code base available for free.
- 2010
- Valve
- Metacritic 77
Worth getting lost in
Inside the series
Select a screenshot to step inside.
