Top free Alternatives to Alien Swarm for
Alien Swarm
- Free
- (111 votes)
Free multiplayer online shoot 'em up
Alien Swarm is a four-player shoot em up, where you play in a team of marines charges with cleaning out the attacking extra terrestrials. It's a pseudo 3D top-down shooter, which has really good production values for a free game!Valve Corporation,...
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