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.
Score 10000000 at Rank Explorer
Score 10000000 at Rank Dungeon Master
Defeat every type of dragon
Gain your freedom
Score 10000000 with all potions active
Fully upgrade your armor
Fully upgrade your shield
Fully upgrade your sword
Fully upgrade your staff
Fully upgrade your home
Do 200 damage in one move
Defeat a Treant
Repair all the rooms in your home
Score a 12 chain