Cheats, Secrets (GameFAQ)

Infinite Liner Launcher:

Attain an A rank with every character in the Battle Game to unlock the Linear Launcher with infinite ammo. Unlike the Rocket Launcher, this will only appear in the Battle Game. Every character will start with it in their inventory and can equip it at any time.

Alternate Claire In Battle Mode:

Complete the main game to obtain Battle Game. Then complete Battle Game once with Claire Redfield, you obtain Alternate Claire Redfield.

First-Person Gameplay During Battle Mode:

To get the First Person Mode in Battle Game, you need to grab Alfred's Sniper Rifle before escaping with Steve during the during main game at the Antarctic Base. Then you'll have this mode in Battle Game.

Get the submachine guns as Chris:

Give Rodrigo the Hemostatic Medicine and the Lighter, when you play as Claire. Then, as Chris, kill the Gulp Worm so that it throws Rodrigo up. He will give Chris the Lighter. Use it on the little torch in the first room you control Chris as and you get secret Submachine Guns.

To play as Steve in Battle Mode:

To play as Steve in battle mode, complete the game collecting the Gold Luger, solving the drawer puzzle in the Rockfort Island save room as Chris, and put it in the item box (or keep it in your inventory if you want...). Once you do that, save our progress, then you can play as Steve in Battle Mode.

Play as Wesker in Battle Mode:

Beat the Battle Mode game as Chris to unlock Wesker's game.

Infinite Rocket Launcher: Beat the main game with an A rank.  Not easy!

Infinite health items glitch:

This glitch will allow you to have an infinite First Aid Spray, Green Herb, Mixed Herb, or any healing item you wish. First, make sure you DO NOT read the Instructions Book file that you get at the start of the game. Get any gun. Now, get the healing item you want for the glitch. Make sure that your inventory is organized in the following order: -Playing Manual. -Your Gun. -Your Healing item. Equip your gun, and then read the Manual. READ IT FROM THE FILES SCREEN. DO NOT CHECK IT. If you did this correctly, you will have your healing item equipped. If that's the case, exit the inventory screen and fire your gun. Now use your healing item. It shouldn't dissapear, it doesn't matter how many times you use it. It will still work if you store it, so Chris should be able to use it, too. DO NOT MIX YOUR HEALING ITEM. IT WILL LOSE HIS INFINITE PROPERTY. This should make getting the Rocket Launcher a piece of cake.

Stopping the game's clock:

During play, open the lid on your GameCube console. This will stop the clock on the game. This is useful when you want to pause the game so that it doesn't take time out of your final rank.

The security code before the Alexia fight: VERONICA.