Here is the full list of all 16 Attack of the Labyrinth achievements.
Kill 30 dark champions
Collect 4K treasure in a run
Destroy 100 graves
Collect 2K treasure in a run
You don't even have to swim in lava
Kill 200 Arachnids
Recovered every scroll
Collect 8K treasure in a run
Collect 10K treasure in a run
Kill an ally
Kill 10 allys
Ok then... Thats it
At least there's no snakes
Obliterate 50 fairies
Collect 10 Medallions
Find all secret champions