They're shelling us! Having survived an attack on a Resistance outpost, Gordon Freeman sets out to take out the Civil Protection's headcrab launcher. Features - Takes place in an abandoned water treatment facility in City 17's canals - Short, linear map - ...

Station 12, do you read? Gordon Freeman is sent out to investigate three rebel outposts that have gone silent, and reactivate their radio transmitters. Features - Takes place in a forest valley in the Outlands, not far from White Forest Base - Large map wi...

Striders really tore the hell out of this place... While evacuating from City 17, Gordon Freeman and the rebels are faced down by a particularly persistent Strider. Features - Takes place in City 17 during the Citadel's meltdown - Difficult, fast paced map...