Full list of all 26 Oh My Girl achievements.
The base game contains 19 achievements, and there is 1 DLC pack containing 7 achievements.
Complete Autumn's Swimming Challenge
Complete Summer's X'mas Challenge
Complete Spring's Leather Challenge
Complete Autumn's Nurse Challenge
Complete Spring's OL Challenge
Complete Your First Image
Complete A Picture in 2 mins
Complete 9 tiles In a Row
Complete 8 Tiles In a Row
Complete 7 Tiles In a Row
Complete 6 Tiles In a Row
Complete 5 Tiles In a Row
Complete 4 Tiles In a Row
Complete 3 Tiles In a Row
Complete 2 Tiles In a Row
Complete All Spring's Images
Complete All Summer's Images
Complete All Autumn's Images
Failed one time
Completer Winter in pajamas
Completer Winter in the gym
Complete Autumn's Cosplay Challenge
Complete Summer's Bikini Challenge
Complete Spring's Maid Challenge
Complete Winter in the bathroom
Complete Summer's Uniform Challenge