Probotector Hints & Cheats

Cheat Codes

Cheat	Effect
At the Title Screen press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start.	30 Lives
At the title screen, press and hold the A & B buttons simultaneously and push Start.	Sound Mode (JPN Only)
If you die in a two player game, hold down A and B simultaneously	Steal life from partner

Stage Select (Japanese version only)
At the title screen, press and hold Up, Left and the A button. While holding these buttons, press Start and immediately hold Select. If done correctly, the stage select screen should appear.

Hard Difficulty
After you beat the game, the credits roll by and you start over with the remaining lives you had. You will also start with the gun you had. This time around, there will be more enemies. They will also shoot a lot more, and some enemies may have more hit points.
Shoot while ducking
When you enter the Base 1 or 2 levels, you can shoot high while ducking. Hold Up on Controller 2 while Controller 1 is ducking. You will be ducking but your bullets will appear to go high. This may be hard to pull off yourself, so help is recommended.
Secret Ending (Japanese Version)
During the ending, before the closing credits starts rolling, press and hold the Select and Start and keep on holding until the credits are over. If done correctly, you will receive a message from Red Falcon, vowing his revenge.

Type	Name	File Size
Other	Level 7 Map by moron_erick	92K
Other	Level 2 Map by moron_erick	77K
Other	Level 4 Map by moron_erick	108K
Other	Level 6 Map by moron_erick	76K
Other	Level 8 Map by moron_erick	100K
Other	Level 1 Map by moron_erick	94K
Other	Level 3 Map by moron_erick	125K
Other	Level 5 Map by moron_erick	103K
FAQ/Walkthrough	FAQ/Walkthrough by skcin7	59K
Other	Contra Series Ending FAQ by ReyVGM	38K
FAQ/Walkthrough	FAQ/Walkthrough by Pseudonym	56K
Boss FAQ	Boss FAQ by Pegboy	16K
FAQ/Walkthrough	FAQ/Walkthrough by RobG	38K
Other	US - Japanese Changes by dgiglio84	3K
FAQ/Walkthrough	FAQ/Walkthrough by Ramagamma	22K
FAQ/Walkthrough	FAQ/Walkthrough by LSomers	21K
FAQ	FAQ by Emptyeye	15K

Hints & FAQs provided courtesy of GameFAQs.