Alien Swarm is a top down shoot-em-up game where the objective of the game is to reach the objectives whilst killing swarms of aliens with various weapons.
CPU: Pentium 4 3.0 GHz
RAM: 1 GB for XP / 2 GB for Vista/7/8/10
Video Card: ATI Radeon X800, NVIDIA GeForce 6600 or better
Free Disk Space: At least 2.5 GB of free space