To enter the following cheats, you have to go to the main menu and select Enter Code:
BLZ: "Custom Balls" option
INF: "Infinite Last Ball" option
NDG: "Tilt" option
DGC: Gottlieb Factory Tour
LUV: Love machine
LAS: Payout mode
PKR: Playboy pinball table
TMA: Tournament mode
XTN: Xolten fortune machine