A half Life1 Opposing Force mod. You're Corporal Shepard. A Soldier which arrives at Black Mesa in an alternate reality. Another Experiment went wrong and your mission: To find out what happened in Black Mesa and rescue the trapped personnel in it.
A small firefight between grunts and Aliens..
Is that the light from the beginning of opposing force?
It's a recreation done by me yes...
A xen party lol