In addition to Rebecca's western costume originally available in the game, every new costume added in the game's HD port is a reference to one of Capcom's previous games.

• S.T.A.R.S. 1996 (Rebecca): Rebecca's costume from Resident Evil
• S.T.A.R.S. 1997 (Rebecca): Resident Evil Director's Cut's Arrange Mode
• S.T.A.R.S. Prototype (Rebecca): The unreleased Nintendo 64 version of RE0
• Sportswear (Rebecca): Resident Evil 2, easter egg
• Cheerleader (Rebecca): Deadly Silence, alternate outfit
• Western (Rebecca): Resident Evil Remake, alternate outfit
• Nurse (Rebecca): Resident Evil: The Mercenaries 3D, alternate outfit
• Battlesuit (Rebecca): Version of Jill's outfit from Resident Evil 5
• Prisoner (Billy): Cody Travers from Final Fight
• Wolf Force (Billy): The Japanese cover art of Mercs

Additionally, three t-shirts are available for Rebecca. They are the winner designs by fans from Capcom's In-Game T-Shirt Contest. One of these was done by former SNK and Capcom's artist Shinkiro (real name Toshiaki Mori). Another one makes a reference to one of Barry's lines from the first Resident Evil.
Contributed by Mass Distraction
Attachment
Attachment