|Game:||Resident Evil Zero|
|Complete the main game|
The minigame is accessed by selecting "Extra" on the Load Game menu.
Before beginning, players have the option to select Rebecca's and Billy's outfits with the "COSTUME CHANGE" option. Rebecca's outfits are "NORMAL", "LEATHER", and "COWGIRL". Billy's outfits are "NORMAL" and "JACKET".
The "HOW TO PLAY" menu option brings up the following explanation of the game;
"You must survive in order to expose this nightmare..."
Billy and Rebecca will begin the game with their respective Handguns, 200 Handgun Ammo each, and a First-Aid Spray each. Other weapons and health items are scattered about the map. There are two possible item location patterns the game can load as well as two possible leech location patterns. The item and leech patterns are picked independently of each other. Enemy placement will stay the same. The game is played in the Umbrella Research Center and its basement. All of the doors are unlock except a few room that can't be entered at all and the rooms with fire motif doors; the player must find the Fire Key to open these rooms.
The health and behavior of most of the enemies is adjusted for the game. Zombies have much more health taking up to ten handgun bullets to drop, and tougher enemies have slightly less health, usually dying from a single grenade launcher shot plus a single handgun bullet. When the player's total leech count nears 100, some rooms become flooded with enemies, even those rooms that have already been cleared out.
After exiting the mansion or having a character die, the game will end and the results screen will be displayed. The number of leeches each character collected, the combined total, and average time taken to pick up the leeches will be shown. Last, the player will receive a rank based on the number of leeches they found and a prizes for the main game based on the their rank.
|Rank||Leech Charms||Unlock message||Reward|
|Unlimited ammo for all weapons and a specific infinite use Molotov Cocktail located in Second Class private room B|
|Magnum Revolver in Second Class private room B.|
|Unlimited Hunting Gun Ammo|
|Unlimited Handgun Ammo|
|More Sub-Machinegun ammo found throughout the game and one clip added to Rebecca's inventory.|