June 15th 1984: Omega Outpost 25, A Sầu Valley, Vietnam.

You and a team of 3 other Requiem Operators have been sent in to the former US Firebase Ripcord, now turned into an Omega Group outpost experimenting with Dark Aether technology, to save top agent Samantha Maxis from the Dark Aether. You eventually pull her out from the dimension but the rest of your team is now dead and the two of you need to make it to evac whilst surrounded by zombies.