Here is the full list of all 21 Braveland achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Fromm defeated.
Two warrior abilities learned.
Page on Facebook or Twitter visited.
Equipment item on.
Treasure chest collected.
Warrior ability learned.
You defeated the army without losing a single warrior.
Peasants have joined you.
Arakin defeated.
Sigurd defeated.
Game completed without using the easy level of difficulty.
Game completed using only the hard level of difficulty.
Three treasure chests collected.
All four equipment items on.
The best equipment of all four types on.
All warrior abilities learned.
Acceleration spell used 10 times.
1000 damage inflicted to the enemies with Fire Arrow.
Defense spell used 10 times.
100 units encouraged.
Rain of Fire spell learned.