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