Full list of all 82 Gears of War 3 achievements worth 2,000 gamerscore. It takes around 1000 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 7 DLC packs containing 32 achievements worth 1,000 Gamerscore.
Recovered 20 of 42 Collectibles.
Complete all Acts in 4 player Co-op on any difficulty.
Reached level 50.
Completed all campaign Acts on Hardcore Difficulty.
Completed all campaign Acts on Insane Difficulty.
Complete all Acts in Co-op on any difficulty.
Earned the Bronze "Force Multiplier" medal.
Your respect for the dead earned you access to Griffin's special weapons stash.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Completed all campaign Acts on Casual or Normal Difficulty.
Killed Myrrah.
Rescued Adam Fenix from captivity.
Earned the Onyx "War Supporter" medal.
Turned off the Maelstrom device.
Passed under the Maelstrom and found Azura.
Launched the sub.
Found enough fuel to get to Endeavor naval base.
Found and activated the fuel pump.
Drove from Anvil Gate to Mercy.
Defeated the Lambent Berserker.
Reached level 25.
Executed your enemies with variety and style.
Survived all 50 waves of Horde.
Earned the Bronze "Loot Courtesan" medal.
Defended Anvil Gate from the Locust siege.
Arrived safely, kinda, at Anvil Gate.
Grabbed a Locust Gas Barge to travel to Anvil Gate.
Completed one match in all six Versus multiplayer modes.
Earned an Onyx medal.
Reached level 15.
Survived the first 10 waves of Horde.
Discovered the location of Adam Fenix.
Recovered 5 of 42 Collectibles.
Blew up the Lambent Leviathan from the bridge.
Defended and escaped from Cougar Stadium.
Completed 5 Arcade Campaign chapters in co-op.
Found food and ammo in Hanover.
Defended the Raven's Nest from Lambent Leviathan.
Woke up from a bad dream.
Wreaked vengence upon humanity!
Completed the first 12 waves of Beast.
Killed 10 enemies in Team Deathmatch.
Executed an infected player and is now turning Lambent.
Reached level 10.
Reached level 5.
Your skill and experience means you’re ready for Standard Versus multiplayer.
Recover all 42 Campaign Collectibles (any difficulty, Standard or Arcade).
Recover all 15 COG Tags during the Campaign (any difficulty, Standard or Arcade).
Earn the Silver "Number 1" medal.
Reach level 100 and earn every Onyx medal.
Found new places to destroy all humans.
Showed your friends the Horde Command Pack sights.
We are the elite Onyx Guard!
The Hammer of Dawn is now online!
Get 500 Silverback rocket kills in Horde (any map, any difficulty).
Used the Mauler shield to kill 10 Gears that had the temerity to fire upon you and your General.
Completed "RAAM's Shadow" in Standard Campaign.
As RAAM, made sure Minh never forgets that day outside the House of Sovereigns.
Ignored all Loader safety guidelines and killed 10 Locusts.
Completed "RAAM's Shadow" in 4 player co-op.
Completed "RAAM's Shadow" in Arcade Campaign.
As RAAM, ripped 50 Gears to shreds with your Kryll.
Showed 50 Locusts the meaning of sky-fire with HOD Command Center.
Honored the memory of Zeta Squad in 10 matches of Versus.
Defeated the first 10 waves of Horde with every member of Zeta in your party.
Won a Versus multiplayer match as a team of five Savage Marauders (any mode).
Won a Versus multiplayer match as a team of five Recruit Claytons (any mode).
Completed all 50 waves of Horde on any of the Fenix Rising maps.
Completed all 12 waves of Beast on all Fenix Rising maps.
Achieve level 100 and choose to re-up for another tour of duty.
Achieve level 100 a second time and choose to re-up for another tour.
Earned all 132 combat ribbons.
Guardian is back!
Led by example and killed 10 opponents as Guardian leader.
Cleaved 25 enemies with a hidden weapon.
The $!*@# was taken down with extreme force.
Captured and "released" 20 opponents as the Savage Hunter.
Completed all 50 waves of Horde on any of the Forces of Nature maps.
Found the right man for the job!
Still standing after 20 waves - you're a natural!
Completed all 12 waves of Beast on all Forces of Nature maps.
Achieve the maximum level on all fortifications in Horde mode.