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