What does a psychopath, a tag along, and a tough buck have in common? Nothing, obviously!

What caused this outbreak? When will it end? How will this affect the future generations? Will these three idiots manage to save the world? Or plunge it into the depths of hell?

The only thing that's certain, is that the world will never be the same again.

(Based off a DnD campaign with a couple buds of mine. So, expect some things to be wacky chaotic, or just not make sense at some points due to DnD logic.)

Red means bad flashback.
Blue means interesting flashbacks.
And Green Means good flashbacks.

Most of the crossover stuff is the weapons only.

[Undergoing minor rewrite to make it more readable.