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