Play Free Roaming Mode as one of the guest stars
Collect all of the time machine parts
Reach a 99X chain multiplier
Hit 4 people with a single shotgun blast
Match all cards in a single round of the casino game at the Spades To Steal Casino
Dethrone GLC's high score
Hit 25 pedestrians in a row with your car without stopping
Get "sick" on "milk"
Knock someone off their bike to ricochet another off theirs
Blow up 8 vehicles in 8 seconds
Kill 256 civilians within a single life
Drive 65,536 pixels
Kill four green sewer dwellers
Raise your threat level by committing a crime that attracts police attention
