To unlock new outfits in Resident Evil Archives Resident Evil. Must first complete the game once with Jill or Chris. Once done, you get the key to the cupboard which is located in one of the trunks of the game This key opens a secret door that looks like a painting.
The latter is on the ground floor in the room with the statue holding a vase in the east wing. From here you can use two alternative costumes for each character. Chris can disguise himself in snowboarding or have his uniform STARS of Resident Evil: Code Veronica while Jill will play the Sarah Connor or stroll about the mansion with her sexy outfit to Resident Evil 3: Nemesis.
