Here is the full list of all 30 Death Skid Marks achievements.
Get all other achievements.
Unlock by seeing all four main endings.
Bring the punk to the concert.
Bring the veteran to the concert.
Bring the hippie to the concert.
Bring the rager to the concert.
Bring the gimp to the concert.
Bring the street worker to the concert.
Finish the game and get the very bad ending.
Finish the game and get the bad ending.
Bring the emo to the concert.
Bring the terminal patient to the concert.
Bring the wrestler to the concert.
Kill 25000 people in all games combined.
Finish the game and get the good ending.
Bring the bear to the concert.
Bring the hobo to the concert.
Bring the horse to the concert.
Bring the road warrior to the concert.
Destroy the saw groupies.
Finish the game and die for their wins.
Bring the black metal head to the concert.
Bring the goth to the concert.
Bring the alien to the concert.
Destroy the groupie from outer space.
Destroy the landcruiser groupies.
Destroy one of the tank groupies.
Destroy Jenny5.
Destroy the brain groupie.
Destroy the Clowns.