Here is the full list of all 14 Robin Hood - there are Sherwood Builders - there are Bandit's Trail achievements.
You have announced yourself to the people of Barnsdale by achieving 20% Reputation there.
Complete your first Royal Convoy Event.
Defeat 25 enemies.
Rumours about you have begun to spread around Barnsdale because you achieved 10% Reputation there.
A memento from Maid Marian.
A memento from Little John.
You’ve completed the game’s tutorial with Friar Tuck.
A memento from Tuck.
Mine your first stone.
Hunt down your first doe.
Cut down your first tree.
Collect your first herb.
Defeat 100 enemies.
Defeat 25 enemies with a backstab.