Here is the full list of all 60 Fight The Dragon achievements.
Reach Level 20 with a character
Complete an adventure online with 3 other players
Kill 300 enemies with a single weapon
Unlock the fourth Fighter ability
Kill 300 enemies with Spears
Complete 50 adventures
Unlock the third Fighter ability
Unlock the third Fire Lord ability
Reach Level 10 with a character
Kill 300 enemies with Hammers
Find and equip a Legendary item
Kill 500 enemies as a Fighter
Playtest an adventure from start to finish in the ACK
Kill 300 enemies with Staffs
Equip an item in every slot
Receive your first Dragon Ring
Unlock the second Fighter ability
Kill 300 enemies with Swords
Kill 500 enemies as a Fire Lord
Collect 2,000 gold
Complete your first dragon encounter
Unlock the second Fire Lord ability
Offer 50 pieces of loot to the Gods
Deposit an item in your Stash
Complete your first campaign
Fill your inventory
Complete an adventure without dying
Complete your first adventure
Kill 500 enemies as an Ice Wizard
Kill 500 enemies as a Black Rogue
Upgrade your inventory to 30 slots and completely fill it
Complete 500 adventures
Complete an adventure in split-screen
Kill 300 enemies with Daggers
Kill 300 enemies with Axes
Kill 300 enemies with Hatchets
Kill 300 enemies with Shurikens
Kill 300 enemies with Short Swords
Kill 300 enemies with Crystals
Talk to 200 NPCs
Spend 30 stat points on a single character
Unlock the fourth Fire Lord ability
Unlock the second Ice Wizard ability
Unlock the third Ice Wizard ability
Unlock the fourth Ice Wizard ability
Unlock the second Black Rogue ability
Unlock the third Black Rogue ability
Unlock the fourth Black Rogue ability
Reach Level 30 with a character
Reach Level 40 with a character
Reach Level 50 with a character
Reach Level 60 with a character
Do 500,000 damage to the dragon
Killed the Dragon
Fire a trap via an event in the ACK
Add 3 stages of dialogue to an NPC in the ACK
Spawn an enemy via an event in the ACK
Kill 300 enemies with Crossbows
Kill 50 enemies with Tomes
Kill 300 enemies with Wands