back in the day i remember when rayne.hellawack was around there were tons and tons of mods on this, i'd spend countless days playing and experimenting with all the crazy guns and features... you do miss out on half the guns in the experiment if you're like me and have a mac with no Num Pad...
 "Red Remover"){kind=icon}
 "Madness interactive - Next-Gen mod"){kind=icon}
 "One Chance"){kind=icon}