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.
Lift Lady Marwen's curse.
Kill the Great White Graug.
Collect 100% of the Ithildin.
Complete all Azkâr Legend Missions.
Complete all Acharn Legend Missions.
Complete all Urfael Legend Missions.
Collect 100% of the Artifacts and listen to their memories.
Brand a Captain while in combat.
Complete all Survivalist Challenges.
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.
Witness the creation of The Rings of Power.
Collect 50% of the Ithildin.
Issue a Death Threat, and then successfully kill the target.
Capitalize on a Warchief's Fear.
Eliminate the bodyguards of two Warchiefs, then draw them out and kill them.
Successfully complete 4 Hunting Challenges.
Complete a Vendetta Mission.
Get Ratbag promoted to Warchief.
Complete a Sword Mission and begin growing the legend of Urfael.
Use the Detonate ability to burn 50 uruks.
Use Strike From Above while at least 60 feet above your target.
Successfully complete a Survivalist Challenge.
Make 20 uruks flee by dropping Morgai Fly nests.
Unlock 4 Dagger Rune slots.
Attract caragors with bait 5 times.
Collect 25% of the Artifacts.
Free 5 caragors from cages.
Complete a Bow Mission and begin growing the legend of Azkâr.
Complete an Outcast Rescue Mission.
Discover some of the Wraith's past.
Unlock 3 Sword Rune slots.
Unlock 2 Bow Rune slots.
Complete a Dagger Mission and begin growing the legend of Acharn.
Make an uruk yours.
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.
The One Ring has returned to it's Maker.
Get a Level 30 Rune in Test of the Ring.
SECRET
Poison a Captain at his own Feast.
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 25 Caragath Stealth Kills.
Complete all Outcast Rescue Missions.
Brand all 5 Warchiefs.
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.
Bait 10 Ghûl mounds.
After an uruk kills you to become a Captain, help him become a Warchief, then kill him.
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.
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.
Start a Riot by commanding a Warchief to attack another Warchief.
Liberate 30 slaves in 180 seconds while riding a caragor.
Use a Wretched Graug's Projectile Vomit on an Uruk Captain or Warchief.