Hiding:
Shoot out lights to make it dark.
Make sure that there are no guards around.
You can't be seen when hiding in dark places.
Don't stay in the light for too long.
Unlock All Levels:
To unlock all levels enter !LAMAUDITE! as your name.
Keypad Codes:
TRAINING LEVEL CODE: 28469
BACKDOOR IN HOUSE: 091772
POLICE PERCINT: 5929
CIA HEADQUARTERS: 7687
CIA HEADQUARTERS (2) CODE: 110598
DEPRESSION CHAMBER: 2019
CIA HEADQUARTERS (3) CODE: 110700
CIA HEADQUARTERS (4) CODE: 0614