Tony Hawk's Pro Skater 4 - PlayStation 2 Non-linear career mode lets skaters choose the level and goals they want. Challenge pros head-to-head to beat their best tricks, take off to a competition, or just skate solo to conquer a gap. Improved skater physics and animations now allow skating on moving objects like cars, trucks or cranes. Also includes more realistic balancing, balls and board dynamics. Go Pro! Play through levels as an amateur, then conquer your pro's special challenge to unlock the more difficult professional world. Ultimate Skate Park editor allows user-set objectives like high scores, hidden tapes, and combo completion. Create a dream park by placing lights, inserting gaps and modifying ground types throughout the park. multiplayer modes and expanded online play let you skate against friends around the globe.