Gina Cross and Colette Green, and is the only official co-operative entry to date. Decay follows two other Black Mesa scientists, Drs.The only expansion (presumed) to be canonical, as Barney later reappears as a significant supporting character in Half-Life 2 and its following episodes. Working to evacuate the facility following the accident, Barney's story examines the outbreak from a survivors perspective instead of combating the problem like Freeman, it's about getting out alive. Blue Shift runs concurrently with about the first third of the main plot, with the player controlling security guard Barney Calhoun.Additionally, Shephard is the only protagonist whose fate still remains completely unknown. Notably fills in what happened in Black Mesa after Freeman takes the battle to Xen. Involved in a chopper crash and separated from his squadron, Shephard awakens as the Marines begin their evacuation. Opposing Force begins shortly after the Resonance Cascade, and has the player controlling Corporal Adrian Shephard, one of numerous US Marines sent as the initial clean-up team.

Half life online