Here is the full list of all 20 Dungeon of Eyden achievements.
Reach your first portal.
Reach the first Dungeon in under 8 Minutes! Hurry Up!
Reach the Dungeon of Eyden
Break the magical spell that lies on the town.
Kill more than 150 Enemies!
Find your first heart container!
Reach 1000 kills lifetime.
Reach 2500 kills lifetime.
Reach 5000 kills lifetime.
Reach 10000 kills lifetime.
Defeated 25 Dungeons lifetime.
Defeated 50 Dungeons lifetime.
Defeated 100 Dungeons lifetime.
Played 100 times lifetime.
Played 500 times lifetime.
Played 1000 times lifetime.
Killed the final Boss one times.
Killed the final Boss three times.
Killed the final Boss five times.
Killed the final Boss ten times.