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