The LW decides, yeah, it'd be chill if the President's Modified FEV got slipped into the water supply. Lo and behold, instead of eradicating mutations and the like, it starts a sort of zombie outbreak -- people not just in the Capital Wasteland, but the Mojave as well, have started deteriorating into mindless, flesh-eating corpses, with no promise of a cure. Now, instead of just having the usual perils of the wastes to deal with (raiders, deathclaws, feral ghouls -- we'll say the LW has the 'animal friend' perk just to keep things safe?), them and their misfit band of survivors (could be possible in-game companions, or just NPCs that you're fond of, OP doesn't care), they start moving to the west, hoping they'll find safety. The LW meets up with the Courier and their ragtag group (see previous note about survivor group), and they decide there's safety in numbers. Eventually, they discover that the surviving group as a whole is a carrier for the zombie virus -- as in, they're giving it to any other survivors they've met.
[GEN] - Left 4 Dead AU/Crossover
Lo and behold, instead of eradicating mutations and the like, it starts a sort of zombie outbreak -- people not just in the Capital Wasteland, but the Mojave as well, have started deteriorating into mindless, flesh-eating corpses, with no promise of a cure. Now, instead of just having the usual perils of the wastes to deal with (raiders, deathclaws, feral ghouls -- we'll say the LW has the 'animal friend' perk just to keep things safe?), them and their misfit band of survivors (could be possible in-game companions, or just NPCs that you're fond of, OP doesn't care), they start moving to the west, hoping they'll find safety.
The LW meets up with the Courier and their ragtag group (see previous note about survivor group), and they decide there's safety in numbers. Eventually, they discover that the surviving group as a whole is a carrier for the zombie virus -- as in, they're giving it to any other survivors they've met.