Here is the full list of all 17 Alum achievements.
You have embarked on the journey of Alum.
You've reached chapter 2
You've reached chapter 3.
You've reached chapter 4.
You've reached chapter 5.
You've reached chapter 6.
You've reached chapter 7.
You beat Colemin's Last Stand!
You beat the sniper sequence!
You've received a rushlight.
Congratulations! You beat the game!
Wow! You beat the game without using hints!
You beat Dashu's Last Stand!
Smoky-mountain maple mighty magic mac and cheese scented. Strange, yet satisfying.
Off with his head!
You shared your rushlight with Pige.
The office chair is an office chair.