Skaters
The game's default in story mode is the Custom Skater. By playing the levels and challenges, the player can pre-emptively access the professional playable characters in Free Skate modes, as well as unlock secret and bonus characters through Story Mode. Skaters include Tony Hawk, Chad Muska, Bam Margera, Mike Vallely, Eric Koston, and many others, including secret characters such as Gene Simmons and the other members of KISS, Iron Man, and Eric Sparrow.
Read more about this topic: Tony Hawk's Underground