When the game has loaded, select your control method at the options screen as usual. Instead of going to "Start Game", press 'Esc'. Wait for the high score chart with the picture of the "T-1000" to appear. As soon as the last digit is printed on the high score chart (i.e. the last 0 on the 10000, in 10th place), click the 'Left' mouse button (or the joystick 'Fire' button if plugged in to port one). Note you must click the button 0.19 seconds after the last digit on the high score chart has been shown on the screen. If you take longer, or click before the last digit is displayed, the cheat won't work, so, precise timing is required. If you find this difficult there's an alternative, although it won't always work. Hold down the 'Fire' button or 'left' mouse button at the high score table until it is finished. Return to the options screen. If you can see the picture of Arnie, but no options are displayed, then the cheat worked. Left click on the mouse (or press 'Fire' on the joystick) to move on. Click again to skip the high score display. If you allow the high score chart to be shown again, the game may mess up. Start the game.

Once you've started playing, you'll notice that a gunpowder and energy readings are displayed for player two even though he isn't active. Now pause the game (press 'P' not 'F1') and type in all the function keys in ascending numerical sequence and you should skip the level you are presently playing. This cheat is for one player only.