This is currently a Flash sale for the Steam Summer Sale and will only be available for another 7 and a half hours-ish (08:00 AM PST). The DLC is also on sale at 75% off for $1.74.
Metacritic Metascore: 75
Metacritic Summary: Half a century after the Red Faction resistance freed Mars, the red planet again becomes a battleground. Colonists struggle for survival in the underground mines after the surface is rendered uninhabitable. When Darius Mason, grandson of revolution heroes Alec Mason and Samanya, unknowingly releases a long-dormant evil, Armageddon is unleashed on Mars. As settlements are torn asunder, only Darius and the Red Faction can save mankind. The battle will take them to the core of the storm-blasted planet through ice caves and lava flows until they are face to face against the unspeakable threat. Red Faction: Armageddon expands on the critically acclaimed, best-selling franchise with new, groundbreaking challenges. You are humanity's last hope for survi