3-D Block

Re-released on 1990 by RCM Group with a slightly different title screen.

Level select:
At the title screen, press A, B, Up, Down on controller 1 then press A to increase level number. By default you can select only first 10 levels. With this cheat, you can select any level up to 20.

Game ending:
At the title screen, press A, B, Up, Down on controller 1 then press Select 10 times. The girl's silhouette will change the color and show actual nude picture.