Complete the indicated task to unlock the corresponding mini-game at the main menu:
Bonus Transit Challenge Courses: complete all five transit courses throughout the game.
BWI Transit: complete the Bigweld Industries transit course.
Chop Shop Transit: complete the Chop Shop transit course.
Jack Hammer's Oil Rush: help Jack with the customers on the bar.
Mansion Transit: complete the Bigweld's Mansion transit course.
Outmode Transit: complete the Outmoe transit course.
Transit System: enter a Transit System for the first time.
Uppercity Transit: complete the Uppercity transit course.
Zip Line Course: find Bigwell in his mansion then complete the ZipLine stage where you hit dominoes.