Primary Collection of Cheats
Play against the CPU and land on an unowned property. Place the property up for auction. Keep bidding $10 to win the auction as no other player can challenge your offer.
Enable the "Cheating is allowed" selection under the "Custom rules" option by clicking on it. Then, press [Plus] when rolling the dice to move one space forward or [Minus] to move one space back.
Cheat mode (WM edition)
Type "gimmesheep" during game play.