Here is the full list of all 13 Drosoph Hotel achievements.
Reach level 10
Reach level 20
Reach level 30
Get all the ghost type in one game file
Get all the monsters in one game file
Press the jukebox
Survive 13 Hunter waves in Survival Mode
Complete all Tutorials
Get the Clown to level 5
Get 600 points in Pedestrian Bowling
Open the dining room door
You arrived at Orange Pines