Fallout 1: Gizmo's dead stinking corpse
Fallout 2: New Reno Arms, but it's not unique in this game, Trader Willy has it as well
Three questions, just for kicks (I'm allowed to break the rules, dammit, I'm an admin!):
Where can you find an XL70E3?
Who is Vree?
We all know Harry from Fallout. The other mutants on that location are called...?