Cool Specials:
Get all 129 goals.

Kid Mode:
Get all 129 goals.

Rollerskates:
Get all 129 goals.

Flame:
Get all 129 goals.

Always Special:
Get all 129 goals.

Perfect Skitch:
Get all 129 goals.

The Secret Tapes:
1-Beneath the bridge in Jersey
2-On top of the billboard infront of the blue bulding in New York
3-On top of the grey building across from the insurance building in Tampa
4-On top of the theater in San Diego
5-On the rail that connects the Pink Hotel and the Big Surf Hotel in Hawaii
6-Above the dome thing by the hptel in Vancouver
7-Inside the glass box above the Slam City Jam
8-When you start in Moscow u will see a building with little domes with crosses on them. On that building somewhere is a red rail and the tape is on the red rail. So climb the building and you will eventually find it.
User Cheat by GCKnight90

Hotter Than Hell level:
Get the last goal (Kill Eric's Best Line) to unlock the Hotter Than Hell level, which features Kiss. You will also unlock the Helicopter FMV sequence.

Get helicopter FMV sequence from Eric Sparrow
User Cheat by Tall_Kid_60991

Tony Hawk's Pro Skater 2 School Level:
In new jersey after jumping the bridge,go to the end of the road,launch off the quarter pipe and while in the air get off the board.Hop onto the platform above,go to the ledge above where the trains come in and get the tape.Now the school from thps2 will be unlocked.
User Cheat by kenpochris

Unlock Gene Simmons:
Finish story mode under the normal difficulty setting.

Unlock Iron Man:
Finish story mode under the beginner difficulty setting.

Unlock T.H.U.D.:
Finish story mode under the sick difficulty setting.

REMEMBER: In the Neversoft FMV sequence at the start of the game, the boy that gets eaten is Eric. The thing that pops out to eat him is T.H.U.D.

Unlock pedestrians:
Clear all gaps in the game to unlock 26 playable pedestrians, including Eric Sparrow, Ollie The Magic Bum, the Chef Dude (makes you do the Boneless and No Complys), the rest of members of KISS, a drug addict, and a drug dealer.

Create-a-deck mode:
Finish Slamma Jamma in story mode.

Kiss Concert FMV sequence:
By By collectinging all the letters that spell K-I-S-S in the Hotter Than Hell level. This will unlock the Kiss FMV sequence. Then, By collecting K-I-S-S again. This will start the KISS Concert.

Bails 1 FMV sequence:
By collecting three secret tapes.

Bails 2 FMV sequence:
By collecting six secret tapes.

Always Hard FMV sequence:
By collecting nine secret tapes.

Lost Footage FMV sequence:
Complete the game under the too easy and beginner difficulty settings to unlock a new "Lost Footage Tape", in which instead of challenging Eric, you punch him and take the tape.

Alternate ending sequence:
Finish story mode twice or complete sick mode to view an alternate ending sequence.