Die Hard Trilogy 2: Viva Las Vegas

Level select:
Press L1(2), Circle(2), Square(2) at the main menu.

Auto-reload:
Pause game play and press Square(2), Triangle(2), Circle(2)
in arcade mode.
Information in this section was contributed by farid_shah.

Slow motion:
Pause game play and press Triangle, L1, Triangle, L1,
Triangle, L1 in arcade mode.
(Information from Cheat Machine)