mothership zeta was the most classic fallout oriented DLC.
Also, point lookout was fun as hell, though the new weapons weren't the most powerful, using a Double Barreled shotgun is awesome.
About TF2 Custom Weapons
I make custom Team Fortress 2 Weaponry that I decide is balanced or not (WITH YOUR HELP!). Maybe if you are a Valve employee you could use this as a base or even more!
@PrinceHeru
And TF2 sucks monkey dick too.