Play Free Roaming Mode as one of the guest stars
Find all hidden loot bags, payphones and invisible walls
Beat Death Cam VHS without dying
Get gold medal scores in all sprees
Collect all of the time machine parts
Avoid the cops at maximum threat level for 1 minute on foot, without taking damage
Reach a 99X chain multiplier
Hit 4 people with a single shotgun blast
Hit 25 pedestrians in a row with your car without stopping
Knock someone off their bike to ricochet another off theirs
Dethrone GLC's high score
Kill 256 civilians within a single life
Get "sick" on "milk"
Raise your threat level by committing a crime that attracts police attention