Here is the full list of all 12 Blind Trust achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Complete the game as Soldier
Collect 10 pick ups as soldier
Explore the caves
Complete the game
Finish the game in 20 beacons
Complete the game as Oracle
Finish the game without running out of mana
Collect all keys
Beat the boss
Complete the puzzle
Complete the Tutorial
Place your second beacon