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.
Your respect for the dead earned you access to Griffin's special weapons stash.
Completed all campaign Acts on Hardcore Difficulty.
Earned the Onyx "War Supporter" medal.
Completed all campaign Acts on Insane Difficulty.
Earned the Silver "Number 1" medal.
Earned the Bronze "Force Multiplier" medal.
Recovered all 15 COG Tags.
Recovered all 42 Collectibles.
Complete all Acts in 4 player Co-op on any difficulty.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Reached level 50.
Completed all campaign Acts on Casual or Normal Difficulty.
Complete all Acts in Co-op on any difficulty.
Killed Myrrah.
Rescued Adam Fenix from captivity.
Executed your enemies with variety and style.
Completed one match in all six Versus multiplayer modes.
Survived all 50 waves of Horde.
Earned an Onyx medal.
Wreaked vengence upon humanity!
Blew up the Lambent Leviathan from the bridge.
Recovered 20 of 42 Collectibles.
Defended and escaped from Cougar Stadium.
Reached level 25.
Completed the first 12 waves of Beast.
Found food and ammo in Hanover.
Woke up from a bad dream.
Turned off the Maelstrom device.
Passed under the Maelstrom and found Azura.
Launched the sub.
Found enough fuel to get to Endeavor naval base.
Recovered 5 of 42 Collectibles.
Found and activated the fuel pump.
Drove from Anvil Gate to Mercy.
Defeated the Lambent Berserker.
Defended Anvil Gate from the Locust siege.
Arrived safely, kinda, at Anvil Gate.
Grabbed a Locust Gas Barge to travel to Anvil Gate.
Completed 5 Arcade Campaign chapters in co-op.
Discovered the location of Adam Fenix.
Executed an infected player and is now turning Lambent.
Reached level 15.
Earned the Bronze "Loot Courtesan" medal.
Reached level 10.
Defended the Raven's Nest from Lambent Leviathan.
Survived the first 10 waves of Horde.
Reached level 5.
Killed 10 enemies in Team Deathmatch.
Your skill and experience means you’re ready for Standard Versus multiplayer.
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!
Good ROI on that Silverback upgrade.
Ignored all Loader safety guidelines and killed 10 Locusts.
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.
Completed "RAAM's Shadow" in 4 player co-op.
Completed "RAAM's Shadow" in Arcade Campaign.
As RAAM, made sure Minh never forgets that day outside the House of Sovereigns.
Showed 50 Locusts the meaning of sky-fire with HOD Command Center.
As RAAM, ripped 50 Gears to shreds with your Kryll.
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.
Level 100 - so nice, I did it twice.
Completed all 12 waves of Beast on all Fenix Rising maps.
Completed all 50 waves of Horde on any of the Fenix Rising maps.
Level 100 and going back for more!
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).
Earned all 132 combat ribbons.
Maxed out all of the Horde fortifications.
Completed all 12 waves of Beast on all Forces of Nature maps.
Captured and "released" 20 opponents as the Savage Hunter.
Cleaved 25 enemies with a hidden weapon.
Completed all 50 waves of Horde on any of the Forces of Nature maps.
The $!*@# was taken down with extreme force.
Found the right man for the job!
Still standing after 20 waves - you're a natural!
Win a match of Guardian on all Forces of Nature maps.
Kill 10 opponents as the leader in a round of Guardian on a Forces of Nature map.