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