Contagion is the launch title for Monochrome LLC who's Founder is responsible for the award-winning and #1 played Half-Life 2 Modification, Zombie Panic: Source.
Eugene, Marcus, and other Survivors return in the spiritual successor of the popular Half-Life 2 Modification Zombie Panic: Source! Contagion is a cooperative survival horror FPS built on the latest Source Engine where players are forced to watch their ammo and aim carefully otherwise be overrun by the zombie hordes.
Contagion requires at least a Radeon X1600 XT or GeForce 6600 GT 256MB to meet recommended requirements running on high graphics setting, with 1080p resolution. This hardware should achieve 60FPS. Another thing to consider is the DirectX capability of your GPU. Contagion needs a GPU capable of running DirectX 8. To summarise, Contagion needs around a 15 year old PC to play at recommended settings.