Here is the full list of all 13 Unicorn Dungeon achievements.
Sir Typhil escaped the dungeon with the unicorn.
Sir Typhil acquired the unicorn!
Sir Typhil rescued Ellen from the dungeon.
Sir Typhil collected 3 tokens without dying.
Sir Typhil traded for an item at the shop.
Sir Typhil died 15 times.
Sir Typhil killed 250 jackals.
Typhil became a knight.
Sir Typhil killed 125 jackals.
Sir Typhil made it to the other end of the long corridor.
Sir Typhil murdered Ellen in cold blood.
Sir Typhil returned from dungeon level 2 alive.
Sir Typhil drank 50 health potions.