WinBack 2: Project Poseidon - Bonus multiplayer characters

WinBack 2: Project Poseidon - Bonus multiplayer characters
Bonus multi-player characters:
Successfully complete the game with an "A" rank on all missions under each game's difficulty setting.

Extra Options:
Successfully complete the game. The "Extra Options" menu allows the game's movies and music to be played.

Shadow Stalker difficulty:
Successfully complete the game to unlock the "Shadow Stalker" difficulty setting in a new game