Secrets
The first type of secret in "Postal 2" is the cheat code. You can enter the cheat codes by pushing the shift key along with "@" or "~". Pushing this will bring up a command console. Typing in the command "SISSY" will enable cheats. You can then enter one of the many cheat codes to alter the game. These include
"iamsolame" to unlock invulnerability, all weapons and unlimited ammo; "Ghost" to allow passing through walls; "LikeABirdy" to allow flying; and "walk" to disable flight and clipping.
Unlock-able
There is only one unlock-able secret in "Postal 2:" Enhanced Mode which becomes available once the game has been beaten.
Reseting the Demo
In the demo version of "Postal 2," you can reset the timer on the demo by entering the command console and typing in the command "Set Gamestate Demotime 9999."
Skateboarding
A player can "skateboard" in "Postal 2" by going to the Visitors Bureau and knocking down the fence. The player can then stand on the fence and kick the ground to skateboard on the fence.