Here is the full list of all 21 Braveland achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Peasants have joined you.
Page on Facebook or Twitter visited.
You defeated the army without losing a single warrior.
Game completed without using the easy level of difficulty.
Game completed using only the hard level of difficulty.
Treasure chest collected.
Three treasure chests collected.
Equipment item on.
All four equipment items on.
The best equipment of all four types on.
Warrior ability learned.
Two warrior abilities learned.
All warrior abilities learned.
Acceleration spell used 10 times.
1000 damage inflicted to the enemies with Fire Arrow.
Defense spell used 10 times.
100 units encouraged.
Rain of Fire spell learned.