Here is the full list of all 14 DungeonMaze achievements.
Enter the second room; Reward unlocked Cemetery Dungeon
Defeat 1 BOSS; Reward unlocked Dark Dungeon
Deal 200 ice damage; Reward unlocked Ice Dungeon
Step into Poison Pool once; Reward unlocked Swamp Dungeon
Acquire Relic Mage Hat; Reward unlocked mage character
Use Health Pot 80 times; Reward unlocked Priest character
Deal 200 cleave damage; Reward unlocked Berserker character
Get 5o daggers; Reward unlocked Assassin character
Kill 50 monsters with dagger as an Assassin; Reward unlocked Relic Dart
Kill 200 ordinary monsters as a Priest; Reward unlocked Relic Cross
Increase the wand 50 times as a Mage; Reward unlocked Relic Magic Pendant
Attack 100 times with bows and arrows as an Archer; Reward unlocked Relic Arrow
Go berserk for 300 rounds as a Berserker; Reward unlocked Relic Hammer
Walk 400 steps as a Knight; Reward unlocked Relic Iron Boots