Killzone HD is a first-person shooter video game that puts players in the role of elite soldiers tasked with defending a colonial planet that has been invaded by an enemy force. Players will have to use their combat and tactical skills to repel the invaders and protect the planet from capture. The game features stunning visuals, intense action-packed battles, and varied mission objectives which require strategic thinking as well as quick reflexes. Killzone HD also includes various multiplayer options for gamers who want to compete against friends or rivals online.