Time to make some Unreal Tournament mods! I'm thinking a trololo-gun. It's not super original, but I'm consider THIS:
Double-kill, multi-kill, EDUARD KHIL!
On the trigger of that announcement, buff the player with all the pickups in the game and start playing Trololo until the buffs wear off. Also the gun goes "LO" when it fires.
I need some ideas for a weapon model and particle effects, though. Any input would be great.