Here is the full list of all 74 Middle-earth: Shadow of Mordor - there are Game of the Year Edition achievements worth 1,680 gamerscore.
Collect 100% of the Ithildin.
Collect 50% of the Ithildin.
Collect 25% of the Artifacts.
Complete an Outcast Rescue Mission.
Save Lithariel's life.
Lift Lady Marwen's curse.
Kill the Great White Graug.
The One Ring has returned to it's Maker.
Brand all 5 Warchiefs.
Build all the Forge Towers in Udun.
Brand a Captain while in combat.
Stealth Brand a Captain.
Wraith Flash Dominate 50 Uruks.
Challenge the Dark Lord in Mordor.
Shadow Brand 20 Uruks.
Use the Detonate ability to burn 50 uruks.
Activate all Forge Towers.
Kill The Hammer.
Kill all 5 Warchiefs before any uruk take their place.
Destroy the Monument Gate and topple the statue of Sauron.
Attract caragors with bait 5 times.
Witness the creation of The Rings of Power.
Unlock 3 Sword Rune slots.
Complete a Vendetta Mission.
Make 20 uruks flee by dropping Morgai Fly nests.
Unlock 2 Bow Rune slots.
Get Ratbag promoted to Warchief.
Eliminate the bodyguards of two Warchiefs, then draw them out and kill them.
Discover some of the Wraith's past.
Free 5 caragors from cages.
Use Strike From Above while at least 60 feet above your target.
Make an uruk yours.
Capitalize on a Warchief's Fear.
Acquire a level 25 Rune.
Begin a new hunt with Torvin.
Maximize the power of the Ring by completing all of the One Ring missions.
Get a Level 30 Rune in Test of the Ring.
Poison a Captain at his own Feast.
Perform an Execution on a flaming Berserker.
Complete all Urfael Legend Missions.
Kill a Graug by dispatching your Ghûls on him.
Catch a Ghûl Matron on fire during the Lord of the Hunt campaign.
Kill a Caragath with an Execution.
Issue a Death Threat, and then successfully kill the target.
Complete 25 Caragath Stealth Kills.
Complete a Dagger Mission and begin growing the legend of Acharn.
Complete a Bow Mission and begin growing the legend of Azkâr.
Complete a Sword Mission and begin growing the legend of Urfael.
Complete all Outcast Rescue Missions.
Complete all objectives in the Test of The Ring.
Complete all Hunting Challenges.
Help a Captain survive a Recruitment Power Struggle, and then kill him and all his new recruits.
Eat a captain with a Wretched Graug.
Have 20 Branded Ghûls at one time.
Unlock 4 Dagger Rune slots.
Complete all Survivalist Challenges.
Bait 10 Ghûl mounds.
After an uruk kills you to become a Captain, help him become a Warchief, then kill him.
Successfully complete a Survivalist Challenge.
Collect 100% of the Artifacts and listen to their memories.
Brand 5 Bodyguards of a Warchief, turning them against him in combat.
Have a dominated Caragath, Wretched Graug and Spitter Ghûl simultaneously.
Activate the Blazing Steed.
SECRET
Complete all objectives in the Test of the Wild.
Complete all Acharn Legend Missions.
Complete all Azkâr Legend Missions.
Defeat all the Beastmaster Warchiefs.
Brand 20 Uruks in 60 seconds.
Start a Riot by commanding a Warchief to attack another Warchief.
Liberate 30 slaves in 180 seconds while riding a caragor.
Successfully complete 4 Hunting Challenges.
Use a Wretched Graug's Projectile Vomit on an Uruk Captain or Warchief.