Here is the full list of all 69 Legends of Pixelia achievements.
Upgrade an item to maximum
Upgrade an item at the blacksmith
Play a Barbarian to hero level 5
Clear dungeon 1
Play a Paladin to hero level 5
Clear dungeon 2
Clear dungeon 3
Clear dungeon 4
Clear dungeon 5
Clear dungeon 6
Clear dungeon 7
Clear dungeon 8
Clear dungeon 9
Clear dungeon 10
Clear dungeon 11
Clear dungeon 12
Clear dungeon 13
Clear dungeon 14
Clear dungeon 1 in hardcore mode
Clear dungeon 2 in hardcore mode
Clear dungeon 3 in hardcore mode
Clear dungeon 4 in hardcore mode
Clear dungeon 5 in hardcore mode
Clear dungeon 6 in hardcore mode
Clear dungeon 7 in hardcore mode
Clear dungeon 8 in hardcore mode
Clear dungeon 9 in hardcore mode
Clear dungeon 10 in hardcore mode
Clear dungeon 11 in hardcore mode
Clear dungeon 12 in hardcore mode
Clear dungeon 13 in hardcore mode
Clear dungeon 14 in hardcore mode
Start a hardcore character
Die with a hardcore character
Clear a dungeon with a score of 1000 or higher
Clear a dungeon with a score of 2500 or higher
Clear a dungeon with a score of 4000 or higher
Pay 1600 gold or more for a single upgrade step
Put 20 or more stat points in the same stat
Max out a stat by putting 40 stat points in it
Max out 2 stats on a hero
Finish 5 pvp matches in versus mode
Finish 50 pvp matches
Finish 100 pvp matches
Play a Knight to hero level 5
Play a Knight to hero level 50
Play a Knight to hero level 100
Play a Barbarian to hero level 50
Play a Barbarian to hero level 100
Play a Paladin to hero level 50
Play a Paladin to hero level 100
Play a Sentinel to hero level 5
Play a Sentinel to hero level 50
Play a Sentinel to hero level 100
Play an Archer to hero level 5
Play an Archer to hero level 50
Play an Archer to hero level 100
Buy the Rigged Dice from the scoundrel
Buy the Casino Dice from the scoundrel
Buy the Devil's Dice from the scoundrel
Play a Vamp Hunter to hero level 5
Play a Vamp Hunter to hero level 50
Play a Vamp Hunter to hero level 100
Play a Mage to hero level 5
Play a Mage to hero level 50
Play a Mage to hero level 100
Equip an epic item
Equip three epic items at the same time
Equip five epic items at the same time