Convert Health to Time
Up, Up, Down, Down, Left, Right, Left, Right, A, B (when paused in Arcade Mode)
Disable Enemy Markers
Right, Right, Right, Right, Left, Down, Up, Right (on mode select screen)
Disable Scope
Right, Down, Right, X, Right, Down, Right, X (on mode select screen)
Exchange 5 Seconds for 1 Life
Up, Up, Down, Down, Left, Right, Left, Right, A, B (when paused)
First-Person View
Up, Up, Up, Up, Down, Down, Down, Down (on mode select screen)
Hidden Mode (All Enemies Visible) Right, Down, Right, X, Up, X, X, Y, Down, Right, Down, Right, X, Y (on mode select screen)
Mirror Mode
Left, Left, Right, X, Down, Down, Up, Y, Up, Right, Down, Up, Left, Down, X (on mode select screen)
Night Mode
Up, Right, Down, Left, Up, X, Y (on mode select screen)
Night Vision Mode
Hold R, press Start (5x) (on mode select screen)
No Crosshair
Right, Right, Right, X (on mode select screen)
No Enemy Targeting Mode
Right, Right, Right, Right, Left, Down, Up, Right (on mode select screen)
No Scope
Right, Down, Right, X, Right, Down, Right, X (on mode select screen)
Professional Mode
Hold R, press Start (4x) (on mode select screen)
Professional Night Vision Mode
Hold R, press Start (6x) (on mode select screen)
Romantic Mode
Left, Right, Right, X, Y (on mode select screen)
Super Fast Speed
Down, Y, Up, X, Y, Down, Right, Down, Right, X, Y (on mode select screen)