Quake 4 is a first-person shooter game and is the fourth game in the Quake series developed by Raven Software and published by Activision. The Quake 4 single player mode continues the story of Quake 2 by pitting the player against a cyborg alien race known as the Strogg. Quake 4 is the next-gen chapter of the  infamous shooter series (built on the DOOM 3 engine). You will take on the role of Matthew Kane, an elite member of Rhino Squad and Earth’s valiant invasion force. Fight alone or with your squad, and in hover tanks and mechanized walkers as you engage in epic missions into the heart of the Strogg war machine. But, in this chaotic war between worlds, the only way to defeat the Strogg is to become one of them. Battle through early missions as a deadly marine, then after your capture as a marine-turned-Strogg, turn the tables to your favor with enhanced abilities and high tech weaponry. Compete online in fast action arena-style multiplayer, or play single player and destroy the Strogg forces once and for all!