Word Association!

mt dew -> yummy

yummy -> pizza

pizza --> hut

hut -> indians. :3

Indians -> Curry (no offence nor pun intended)

Curry -> Fallout 3 (It is one of the rarest aid items, if I recall correctly, didn't like F3 as much as NV)

Fallout 3 -> Fallout 2

Fallout 2 -> Fallout 1

I cant think of anything for this one so I might pass it back to you :p

Fallout 1 -> Bombs