WinBack : Covert Operations Cheats (Nintendo 64)

At the "Press Start" screen, press Down, Up(2), Down(3), C-Left, C-Up, then hold C-Up and
press Start.

To lock on further with the pistol, you have to use the machine gun, lock on and switch
back to the pistol and it will stay locked on.  But if you reload after you locked on, you
have to do it all over again.

Successfully complete the game on the hard difficulty setting to unlock max power, sudden
death and trial modes.

At the Main Menu, press Up, Down, Down, Right, Right, Right, Left, Left, Left, Left,
C-Down + Start.

At the "Press Start" screen, press Up, Down(2), Right(3), Left(4), then hold C-Up and
press Start to unlock all the Bosses as well as the engineer and a few army characters in
multi-player mode. Most of the Bosses have odd guns and may not be able to back up against
walls or roll. Alternatively, successfully complete the game on the easy and normal
difficulty settings.