The player controls a Delta Force soldier codenamed Nomad. The player’s weapons can be customized without pausing the flow of time, for example changing firing modes, changing scopes or adding sound suppressors. The player is also capable of selecting various modes in Nomad’s military “Nanosuit” which draw power from the suit’s energy

 

After Helena Rosenthal sends a distress signal saying the North Koreans are invading the seemingly unimportant island on which her team is working, the US government dispatches Raptor Team, a group of nanosuit-clad soldiers. After arriving on the island, however, Raptor Team’s ranks are thinned by mysterious flying creatures, eventually leaving only Nomad, Psycho, and Prophet, who is subsequently kidnapped by the organisms later called the Ceph. Nomad rescues Helena but is eventually trapped in the alien ship after it unleashes an “ice sphere” on the island, freezing a great deal of the island.

 

Nomad escapes the island with Helena and an oddly-behaving Prophet, and returns to the US carrier fleet, where he finds Psycho. Prophet returns to the island, which is subsequently nuked in the attempt to kill the aliens. However, they only grow stronger from the energy. The aliens launch a massive attack on the carrier fleet, successfully destroying it. Nomad, Psycho, and Helena escape and receive a distress signal from the still-alive Prophet, and decide to return to the island.