Crysis is a science fiction first-person shooter video game developed by Crytek Frankfurt (Crytek), Germany, published by Electronic Arts for Microsoft Windows, and released in November 2007. It is the first game of a trilogy. A separate game entitled Crysis Warhead was released on September 12, 2008, and follows similar events as Crysis but from a different narrative perspective. Crysis, Crysis Warhead and a multiplayer expansion called Crysis Wars were re-released as a compilation pack titled Crysis Maximum Edition on 5 May 2009.

The game is based in a future where an ancient alien (Extraterrestrial life) spacecraft has been discovered beneath the ground on an island near the coast of the East Philippines. The single-player campaign has the player assume the role of United States Delta Force operator Jake Dunn, referred to in-game by his call sign, Nomad. Nomad is armed with various futuristic weapons and equipment, most notably a "Nano Muscle Suit (Powered exoskeleton)" which was inspired by a real-life military concept (Future Force Warrior).cite web url = title = Inside Crysis: The Attack of The Lag accessdate = 2007-09-24 date=2007-09 author = Logan Booker publisher = Atomicpc In Crysis, the player fights both North Korean and extraterrestrial (extraterrestrial life) enemies, in various environments on and around a tropical island in the Pacific near Korea.