Here are the games for the Wii and Nintendo DS which have been released, and are based on the movies High School Musical or High School Musical 2:

High School Musical: Makin' the Cut (Nintendo DS)
High School Musical: Work This Out (Nintendo DS)
High School Musical (with Microphone) (Wii)

   

Here are the PS2 and DVD games which have been released, based on the movies High School Musical or High School Musical 2:

High School Musical Sing It! (PS2)
High School Musical (Interactive DVD Game)