Mr. Driller Great Cheats - PlayStation

Extra lives
Select Mission Driller mode. Highlight a character at the selection screen, then hold [L1] + [L2] + [R1] + [R2] + [Select] and press [Circle]. You can now choose to have up to nine lives.

Bonus Driller level
Successfully complete Scenario Driller mode. Highlight the "Free Scenario" option at the main menu, then hold [L1] + [L2] + [R1] + [R2] and press [Circle].

Play as Keel
Successfully complete Scenario Driller mode. Select two player mode, then have player two highlight Susumu at the character selection screen and hold [L1] + [L2] + [R1] + [R2].

Play as Eguri
Successfully complete Scenario Driller mode. Select two player mode, then have player two highlight Anna at the character selection screen and hold [L1] + [L2] + [R1] + [R2].

Play as Kowasu
Successfully complete Scenario Driller mode. Select two player mode, then have player two highlight Taizou at the character selection screen and hold [L1] + [L2] + [R1] + [R2].

North Pole level
Successfully complete the India, America, and Egypt levels in Mission Driller mode.

Play as Usagi
Successfully complete the North Pole level in Mission Driller mode.