Nonconformist achievement in South Park: The Stick of Truth

This is story related and cannot be missed. To get the goths you must get the following items:

Goth Clothes - Bought from the merchant infront of U-Store-It

Coffee - Bought at Tweek Bros.

Cigarettes - Gotten after you defeat the 6th graders in the alley between Jimbo's Guns & Skeeter's Bar.

Report back to them and complete the mission they give you. After that, the achievement will unlock.