FileShack

You play just like it's a HL2 campaign, but it's online with your buddies! Play as Rebels or Combines; the strategies and objectives are different:
-Combines objectives:
1- Reach and unlock the Precinct 15 sector door to gain access to the Rebels area.
2- Blowup the Rebels weapons truck hidden behind the Rebel HQ to cut-off their heavy armament supplies.
3- Destroy the Control Room inside the HQ to destroy the whole place.

-Rebels objectives:
1- Prevent the Combines from reaching the sector door.
2- Defend the weapons truck and most importantly the Control Room.
3- Deliver Alyx, "frozen" and held in the Combines base and bring her back to the HQ to teleport her back to Kleiner's lab.