This Big Pack introduces 35 completely new tracks: 23 racing tracks and 12 skill game tracks. Five new tournaments include all the new tracks. For level designers the Big Pack provides more than 50 new crazy physics objects: car, rocket turbine, gravity field, wind, motor and many others! Three new fun achievements to unlock worth 50 extra gamerscore. Fasten your helmet and prepare for serious bruises! (via MajorNelson)
Check out the Trials HD Big Pack DLC for 400 points. Included in the pack are 35 new tracks, 23 racing tracks, 12 skill games and 5 new tournaments. Track creators will have 50 new objects and physics to play and around with and build some crazy tracks. All this plus 3 new achievements for 50 gamerscore can be yours for 400 points ($5).