Hard Mode:
You must collect the first level green gem for this to work. Complete the game and wait until the credits end. Save your game, then restart to get the Hard difficulty level.

Alternate Costumes:
Playing in 'Hard ' Mode, you must collect the special purple gems found on the 'Execution Tower' level. Beat the game, and save it. Start over and press Up to select a new costume.

Fight Renon:
If you spend over 30,000 buying stuff from Renon, he'll attack you.

GameShark Codes

Infinite Health			81389c3e0064

Infinite Throwing Weapon	81389c48000a

Thanks to Revolution readers Rob Miracle, Ray Smalley, Wolfy, Robert B., BurnCycl, and Big Bad Baldwin!