," the activation code was the key to unlocking a cinematic first-person shooter experience, allowing fans of the film to step into the boots of a Marine and engage in high-stakes urban warfare. Once the code was successfully entered and verified, the barriers between the consumer and the creative work dissolved, allowing for the immersive experience the game promised.

The is that the single-player campaign—the core FPS experience—usually does not require an activation code on the disc versions. The code was exclusively for the "Online Pass." If you have the disc, the single-player campaign is yours to play, offering that short, explosive 3 to 4-hour trip through an alien invasion.