Here is the full list of all 14 10,000,000 achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Defeat every type of dragon
Score 10000000 with all potions active
Score 10000000 at Rank Explorer
Score 10000000 at Rank Dungeon Master
Gain your freedom
Fully upgrade your armor
Fully upgrade your shield
Do 200 damage in one move
Fully upgrade your sword
Fully upgrade your staff
Defeat a Treant
Fully upgrade your home
Repair all the rooms in your home
Score a 12 chain