Trainyard

Disable Powerstation
-To manage that you will have to cross the fence to the other side of the railroad. Run through the gauntlet or find a safer way. Previous attempt with crowbar has failed. Just shoot the damn thing untill it breaks.

Disable Combine Communications
-With Citadels main Communication System down, Combine rely on primitive human technology. There are two consoles control it. We can make use of those.

Withstand the Counter attack
-Fall of the station won't go unnoticed. Stand your ground until reinforcements arrive.

Link up with Attack Force Gamma
-They were supposed to hit the station from tunnels. There is a hatch leading to tunnels. Find them and stand by for new orders.