Here is the full list of all 30 Maid Mansion achievements.
Reach Ending 1.
Reach Ending 14.
Convince your secretary to apologize.
Reach Ending 2.
Reach Ending 4.
Let Misaki stay at the mansion.
Punish Takako for making a mistake.
Reach any one possible ending.
Reach Ending 8.
Kick Misaki out of the mansion.
Arrive at the mansion.
Start a new game.
Reach Ending 3.
Reach Ending 5.
Reach Ending 6.
Reach Ending 7.
Reach Ending 9.
Reach Ending 10.
Reach Ending 11.
Reach Ending 12.
Reach Ending 13.
Reach Ending 15.
Reach Ending 16.
Reach Ending 17.
Reach Ending 18.
Reach Ending 19.
Reach Ending 20.
Reach Ending 21.
Reach Ending 22.
Reach all possible endings.