Here is the full list of all 10 Gamer Girls (18+) achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Gamer_Girl_10
Gamer_Girl_9
Gamer_Girl_8
Gamer_Girl_7
Gamer_Girl_6
Gamer_Girl_5
Gamer_Girl_4
Gamer_Girl_3
Gamer_Girl_2
Gamer_Girl_1