Frequency cheats and cheat codes for Playstation 2

Cheat mode:
To enable cheat mode go to the title screen, then press 
Down, Right, Up, Left, Left, Up, Right, Down
After, during a gameplay enter any of the codes bellow:

Bonus autocatcher: Press Left, Right, Right, Left, Up.
Bonus bumper: Press Right, Left, Right, Left, Up.
Bonus crippler: Press Left, Right, Left, Right, Down.
Bonus freestyler: Press Left, Right, Right, Left, Down.
Bonus multiplier: Press Right, Left, Left, Right, Up.
Bonus neutralizer: Press Left, Right, Left, Right, Up.
Gem graphics: Press Up, Down, Up, Down, Left, Right, Right, Left.
Graphics mode 1: Press Down, Up, Down, Up, Right, Left, Left, Right.
Gaphics mode 2: Press Down, Up, Up, Down, Down, Up, Up, Down.

Listen mode: In solo game menu, enter L1, R1, R2, Select.
Practice mode: In solo game menu, enter Up, Down, Left, Right, X, X, X.

Unlock Elixia song from Efishant at the remixes:
While playing a game, press pause after press 
Up, Down, Left, Right, Left. 

Unlock the "Luge Crash" song from Surgecore:
Finish the game in the expert mode.
Play that song after complete it to unlock another song from 
Robotkid and Intersekt.