Here is the full list of all 38 DUNGEON ENCOUNTERS achievements.
Unlock all achievements.
Find and befriend all members of the Academy.
Chart every tile.
Compile profiles on all fiends.
Chart 88,000 tiles.
Reach Floor 99.
Chart 80,000 tiles.
Chart 70,000 tiles.
Deal more than 100,000 damage with a single attack.
Deal more than 50,000 damage with a single attack.
Deal more than 20,000 damage with a single attack.
Chart 60,000 tiles.
Acquire all abilities.
Chart 50,000 tiles.
Deal more than 10,000 damage with a single attack.
Chart 40,000 tiles.
Compile profiles on 75 fiends.
Reach the Glacial Tomb.
Reach Fading Twilight.
Acquire 30 abilities.
Reach the Rift Beyond.
Reach Forgotten Glory.
Reach the Enshrouding Mists.
Reach the Blasted Wastes.
Deal more than 5,000 damage with a single attack.
Chart 30,000 tiles.
Acquire 20 abilities.
Compile profiles on 50 fiends.
Reach the Molten Crags.
Chart 20,000 tiles.
Reach the Undulating Sands.
Deal more than 3,000 damage with a single attack.
Deal more than 1,000 damage with a single attack.
Acquire 10 abilities.
Chart 10,000 tiles.
Compile profiles on 25 fiends.
Reach Paradise Lost.
Reach the Underworld.