In a desperate war for Earth's survival against an unrelenting alien enemy, the only way to defeat them is to become one of them.....

Earth is under a desperate siege by the Strogg, a barbaric alien race moving through the universe annihilating any civilization in their path.  In a valient attempt to survive a Strogg attack on Earth, an armada of Earth’s finest warriors are sent to take the battle to the Strogg home planet.

Earth’s initial fight results in massive losses, but one marine manages to infiltrate the base, bring down their planetary defense systems, and kill the Strogg’s collective brain and leader- the Makron.

Imagine yourself Matthew Kane, an elite member of Rhino Squad and Earth's valiant invasion force.

Engage in a heroic mission to the heart of the Strogg war machine.

Battle through early missions as a deadly marine, then after your capture, as a marine-turned-Strogg with enhanced abilities and the power to turn the tide of the war.

Built on ID Software's revolutionary DOOM 3 technology...

QUAKE 4 also features fast-paced multiplayer competition action!

• Arena-style multiplayer that allows players to play as Strogg or a Marine in deathmatch
• Fight alongside other marines in both small squad missions along with large, epic battles
• Allows diversity of combat with indoor and outdoor environments along with mechanized walkers and hover tanks
• Battle through the early portion of the game as an elite marine, then after your capture as a “Stroggified” marine
• Utilize hi-tech weaponry with upgradeable special modifications