Here is the full list of all 17 Temporal Temple achievements.
Unlock Dan
Unlock Mary
Unlock Big Tam
Die 25 times
Unlock Jakarta
Use the chest three times in a single run
Watch the credits. Thanks!
Purchase an item from the shop
You found it!
Jump 69 times in a single run
Unlock Bone Boy
Last over 60 seconds in a single run
Use the Healing Shrine to recover health
Kill a haunted enemy
Kill five Big Guys in a single run
Purchase a weapon from the chest
Last at least 30 seconds in a single run