Crysis

The game that started the popular Crysis series. You control a member of Delta Force special military squad, codenamed Nomad. Your squad was sent to rescue a group of American archeologists who are about to be imprisoned by North Korea. The archeologists recently made a world-changing discovery that needs to be protected by any means. Soon it turns out your real enemy is not North Koreans, but rather something not from this world. The plot is told partly through cutscenes, but mostly through in-game events that the player participates in.