Here is the full list of all 12 Abyss Protection achievements.
Survived 100 waves
Total received 10.000 gold
Kill 100 monsters
Survived 10 waves
Total received 1000 gold
Kill 10 monsters
Survived 1 waves
Kill 1000 monsters
Kill 10.000 monsters
Total received 100.000 gold
Total received 1.000.000 gold
Survived 1000 waves