Here is the full list of all 22 Arcade Waifu achievements.
Complete Scene 1
Complete Bonus Scene 1
Complete Scene 2
Complete Bonus Scene 2
Complete Scene 3
Complete Bonus Scene 3
Complete Scene 4
Complete Bonus Scene 4
Complete Scene 5
Complete Bonus Scene 5
Complete Scene 6
Complete Bonus Scene 6
Complete Scene 7
Complete Bonus Scene 7
Complete Scene 8
Complete Bonus Scene 8
Complete Scene 9
Complete Bonus Scene 9
Complete Scene 10
Complete Bonus Scene 10
Push the button!
Pull the trigger!