Here is the full list of all 23 Desert Child achievements.
Chill for over an hour
Phone mom for a loan
Start a new game plus
Beat the game
Never buy cigarettes.
Achieve max notoriety, the rank of Pablo Escobar.
Fend off the police without being shot.
Survive a full month on Mars.
Have a bad trip. Race on 4 stacks of strange beans.
Eat all the bean types
Complete your record collection
Have 69% hunger.
Buy every newspaper
Attempt to race with over 75% damage and hunger
Have over $9000
Eat 5 bean types.
Equip more than 30 power cells to a bike
Collect all the secret tapes
Buy fish from the fishermen
Eat a snack pack without throwing up
Take a pizza delivery job.
Successfully rob a bike on the street
Destroy two enemies at the same time