Note: This cheat requires the Windows version of the game. Remove the game CD from the CD-ROM drive. Then, click on the Police Quest 4 icon. Now click on the "Cancel" option of the drive not ready error message. Repeat this at least four more times, and cancel each error message. When the error message appears again, insert the game disc and repeatedly click the "Retry" option. Select a location from the list of all game locations. Then, select a day from the list of days. Now the game will begin at the select location and day.
The arcade machines in the Short Stop Bar can be played. Make sure the arcade machine is not being played by anyone. Then, place a couple of coins in the machine, and click on the machine with the hand icon to play the rocket game or truck game.