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