Here is the full list of all 52 Gangs of Sherwood achievements.
Find and equip all the different Artifacts
High five with an ally
Revive an ally
Finish any Mission with more than one player
As Little John, successfully perform 100 Heat Attacks
Find all the Gang's Mementos
As Robin, get killed by the Prioress of Kirklees
Complete all the People's Requests
Kill an enemy by throwing Gold at them
As Friar Tuck, successfully perform 100 Charge Attacks
Perform 15 Parry Attacks in total
Kill all the Crows in Edwinstowe
Unlock all Gears for all for all heroes
Complete all Lessons
Buy everything from Antonna Carridge with all Heroes
Kill all of Marian's siblings
Find all of Alan-a-Dale's puppets
Grapple Attack 25 enemies
Unlock all Gears for all for one hero
Perform a Throw on a enemy
As Robin, successfully fire a total of 100 Star Arrows
Get a Headshot Kill on an enemy
Purchase the Origin Outfit at Remington Cole
Launch 50 different enemies
Buy everything from Antonna Carridge with one Hero
Complete the Tyrant's Pit in under 10 minutes
Complete all the story acts on Normal difficulty
Eliminate the Sheriff of Nottingham
Perform a 100 hit combo
Perform 25 Finishers
Perform a Rebel Ability
Eliminate the Prioress of Kirklees and Red Roger
Purchase an Outfit at the Remington Cole
Kill 15 enemies by pushing or throwing them off ledges
Earn an S-rank in any encounter
Perform a Finisher
Defeat The Ram
Be in Rebel Instinct for a combined total of 2 minutes
As Marian, successfully perform 100 Flux triggers
Activate Rebel Instinct
Eliminate Guy of Gisborne
Raise the Gang's Power to Level 4 while in any Mission
Defeat an enemy by lighting them on fire
Perform an Air Combo
Donate 5000 Gold at the end of any Mission
Push an enemy so they fall off a ledge
Find and equip your first Artifact
Complete Major Oak Calls
Donate Gold to a Resistance's Checkpoint
Complete all the story acts with all heroes
Finish every mission with more than one player
Complete all Challenges