NBA Jam (Arcade Only) Easter Egg - Mini Tank Game

At the match-up screen hold down all the buttons for all of the players, even blank ones while pushing all four control sticks down. Wait a few seconds and the 3D tank game will begin. A positive kill ratio, where you destroy more tanks than you lose, activates a ton of cheats!
The sound of the tank's cannon is one bounce of the basket ball and blowing up an enemy tank is the same as a broken back glass.