Tony Hawk's Underground 2

When you get all the gaps, you unlock the following:

Throw a bead at any girl in New Orleans, and they'll pull up their shirt to reveal the word, censor.

Go into the cheats menu, and type in:

First go to the Berlin level and go inside the church. Then climb the ladder and go around to the side where you could acid drop outside the church. But instead of acid dropping go right and jump into a little space on the right. Keep hopping up and you will keep going higher and higher. In the air press Z to get on your board and you will keep bouncing back and forth. Now you can do unlimited moves to get insane points! Get off your board when you want to stop.

For this, you need Pro Skater unlocked. To do this glitch, go to Pro Skater in Space and go to an elevator and set a restart in there. Go out of the elevator, then pause and select goto restart, and then you'll be stuck in the elevator! To get out, you would have to switch to a different level, then go back, or just quit and get to the main menu.

In Boston, on one of the buildings you will find a bar, by the name of Jeers in the same style logo as the one on the TV show, Cheers. When doing a particular goal, you can get inside, and you'll see this is indeed made to be a replica of the bar.

Go to create-a-skater and enter any of these names in as the name of your skater and your skater will become that character.

Go to Boston towards the apartment complex. Spine the apartment, but get off your board and end up in the apartment building. Talk to the kid and he will start swinging whatever it is he's holding like a lightsaber. This is an obvious reference to the 'Star Wars Kid' that was taped, pirated, and ridiculed for a rough month.

NOTE: There are two apartment rooms, so if you go to the wrong one, the other one is just on the other side of the building.