Invincibility
Find the posters mounted on the pole at the bar. Then, click on the posters in the following pattern: top, bottom, second from the top, second from the bottom, and continue until the center poster is clicked.

Unlimited money
Collect all the money from the bar, including the amount from finding and selling the hidden Mech in the floor. Save the game, quit, and restart. All the money previously taken will re-appear again. Repeat this procedure to increase your total funds.

Restore hit points
While playing a game, press [Shift] + [F11] + [F12].

Nude character
Select "Lucky Winner" and click on the "C" in the word "Lucky".