http://www.nintendoplayer.com/prototype/nba-jam-xxx-super-nintendo-prototype/

Due to the memory constraints of the 16-bit system, the long strands of voice samples from the classic arcade game had to be modified to fit a Super Nintendo cartridge. Tim Kitzrow, NBA Jam‘s memorable voice-over announcer, was called back into the studio to shorten his calls. During one of these recording sessions, a number of outtakes were saved as a joke, which served as the basis for a special, profanity-filled, in-house-only game–one that, if word ever got out about its existence, could have severely jeopardized Acclaim’s relationship with the NBA league and completely shut down NBA Jam‘s development for good.

At least, that was the explanation given from this supposed Acclaim employee. Even after almost two decades, this industry insider remains in hiding, unwilling to publicly divulge his identity for fear of retaliation.

Famous lines like “Boom-Shakalaka” and “He’s on fire” have been removed and replaced with colorful, crude curses. We have assembled a list of the vulgar commentary below (click on any phrase to listen to the .mp3):

Cutting edge stuff back then, I guess. My family went crazy when Bart Simpson said the word "Damn". I can imagine the uproar something like this would have caused. It's pretty tame and actually kinda lame by today's standards.