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