The prod from worms was badass. Unless of course your a ****-hair too far away from them, in which case you just tried to humiliate them, and you in turn wasted your turn by getting really close to them.
And I second the notion of playing pretty much any Oblivion/Fallout 3 game on the PC. Sure the chinese assault rifle is good, but can it really beat my 25mm Flak Cannon? What about literally wandering the desert with an m4 carbine, a colt peacemaker (with the most satisfying blast sound ever. execution style headshots were never soo awesome.), and a Frenchi Spas 12. User made mods ftw.
And the BB gun didnt used to be useless. Fallout 2 is was the greatest weapon I'd seen in there. You get the sniper perk (upgrades all ranged hits to crits) and shoot them in the various body parts till their totally crippled. Then Shoot them in the balls with a shotgun till they die. You cant get worse of a death than that.
Most useless weapon?
Fishing Pole in WoW. The regular one. Lets see you fight your way out of getting ganked while fishing with that piece of shit.