Here is the full list of all 21 21 Days achievements.
listen what happened to Kareem’s family
survive for 10 days
console the elderly man
understand all conversation
do gas pumping at Shell Gas station
pile up Bricks at Factory
visit Shell gas station
visit Restaurant Sylvia
take a rest in Central Park
eat Halal food
talk to Mahdi
do carpentry at Factory
work as a server at Restaurant Sylvia
work as a cashier at Restaurant Sylvia
work as a cashier at Shell Gas station
get the ticket from Lucas
do volunteer work ar Refugee School
visit Back Street
talk to everyone at least once
meet the ending of the game
work more for family who arrived here