[2] The United Arms Organization constructs a top-secret training facility, codenamed Dark Arena, on a small, isolated island on an alien planet.

[3] No sooner after this occurs, Angelina Bradshaw and her special operations team are summoned to the island to try and get things back under control, but all of her men are no match for the GEOs, leaving her trapped alone deep in Dark Arena.

Unwilling to share the fate of her comrades, she begins to battle her way out of Dark Arena and must race against time to clear out a path to a hangar on the outskirts of the island and evacuate before a nuclear strike is called to destroy all GEOs as a last resort.

If the player completes the game on the easiest difficulty, Angelina is ambushed and killed at the hangar by enemies that she did not encounter on her way out, who intelligently set a trap for her.

[7] The mixed reaction was primarily due to poor enemy AI and uninspired level design, but the game was also praised for having many nice touches often not included in pseudo-3D FPS, such as a sniper rifle with zoom functions and a guided missile.