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.
Acceleration spell used 10 times.
All warrior abilities learned.
The best equipment of all four types on.
Rain of Fire spell learned.
100 units encouraged.
Defense spell used 10 times.
Three treasure chests collected.
All four equipment items on.
Arakin defeated.
1000 damage inflicted to the enemies with Fire Arrow.
Page on Facebook or Twitter visited.
Fromm defeated.
Equipment item on.
Two warrior abilities learned.
Treasure chest collected.
Warrior ability learned.
You defeated the army without losing a single warrior.
Peasants have joined you.