Resident Evil 4 (PC)

Ada
Clear Village stage with 4 or more stars rank.

Alternate Title Screen
Beat the game once.

Ashley Special 1
Beat the game once.

Ashley Special 2
Beat the Separate Way.

Assignment Ada
Beat the game once.

Chicago Typewriter (Main Game)
Beat Separate Way once.

Chicago Typewriter (Separate Way)
Clear Assignment Ada.

Handcannon
Get 5 stars rank in all Mercenaries stages with every characters.

Hunk
Clear Military stage with 4 or more stars rank.

Infinite Rocket Launcher
Beat the game once.

Krauser
Clear Castle stage with 4 or more stars rank.

Leon Special 1
Beat the game once.

Leon Special 2
Beat the Separate Way.

Matilda
Beat the game once.

Mecenaries
Beat the game once.

Movie Browser
Beat the game once.

P.R.L. 412
Beat the game on Professional mode once.

Professional Mode
Beat the game once on the Normal difficulty setting.

Separate Way
Beat the game once.

Wesker
Clear Waterworld stage with 4 or more stars rank.