Here is the full list of all 15 LootLite achievements.
Complete the Peninsular Prairies
Complete the Desert
Complete the Volcano
Complete the Graveyard
Complete the Reptile Island
Activate a Loop Mode
Finish a run as a Warrior
Finish a run as a Mage
Finish a run as an Assassin
Finish a run as a Barbarian
Finish a run as an Apothecary
Finish a run as a Necromancer
Finish a run as a Dragon Knight
Finish a No-Hit run
Finish a run as a Scavenger