Your team investigates a disturbance in a base centered in North America by sneaking onto a cargo truck . You are security guards protecting a facility from greedy companies and invading aliens trying to steal 'teleportational' technology. Smidge A test map that features a skirmish between friendly and normal human grunts. It's very, very small, but can be enjoyable. HERE for full information on this map pack.
Most levels are quite detailed, and there's a good range of environments to keep things interesting.
In this series of maps, the players set out to make their way to a underground facility on the tail of a Spy. These maps were extremely popular on their release, mainly due to their walkthrough nature and exciting set pieces. In these maps, the players crawl out of the wreckage of their helicopter to find they are on a cliff. The only way in is an infested mineshaft, with a high-level warning from the military to stay out. In, however, is the only way.