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.
Complete all Acts in 4 player Co-op on any difficulty.
Earned the Onyx "War Supporter" medal.
Executed your enemies with variety and style.
Earned the Bronze "Force Multiplier" medal.
Reached level 50.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Completed the first 12 waves of Beast.
Wreaked vengence upon humanity!
Survived all 50 waves of Horde.
Earned the Bronze "Loot Courtesan" medal.
Survived the first 10 waves of Horde.
Completed one match in all six Versus multiplayer modes.
Killed 10 enemies in Team Deathmatch.
Found enough fuel to get to Endeavor naval base.
Launched the sub.
Passed under the Maelstrom and found Azura.
Turned off the Maelstrom device.
Rescued Adam Fenix from captivity.
Killed Myrrah.
Completed all campaign Acts on Casual or Normal Difficulty.
Completed all campaign Acts on Hardcore Difficulty.
Completed all campaign Acts on Insane Difficulty.
Recovered 20 of 42 Collectibles.
Recovered all 42 Collectibles.
Recovered all 15 COG Tags.
Complete all Acts in Co-op on any difficulty.
Reached level 10.
Reached level 15.
Reached level 25.
Earned the Silver "Number 1" medal.
Earned an Onyx medal.
Executed an infected player and is now turning Lambent.
Your respect for the dead earned you access to Griffin's special weapons stash.
Found and activated the fuel pump.
Drove from Anvil Gate to Mercy.
Completed 5 Arcade Campaign chapters in co-op.
Recovered 5 of 42 Collectibles.
Arrived safely, kinda, at Anvil Gate.
Defeated the Lambent Berserker.
Reached level 5.
Defended Anvil Gate from the Locust siege.
Grabbed a Locust Gas Barge to travel to Anvil Gate.
Discovered the location of Adam Fenix.
Blew up the Lambent Leviathan from the bridge.
Defended and escaped from Cougar Stadium.
Found food and ammo in Hanover.
Defended the Raven's Nest from Lambent Leviathan.
Woke up from a bad dream.
Your skill and experience means you’re ready for Standard Versus multiplayer.
Reach level 100 and earn every Onyx medal.
We are the elite Onyx Guard!
Found new places to destroy all humans.
Showed your friends the Horde Command Pack sights.
Good ROI on that Silverback upgrade.
The Hammer of Dawn is now online!
As RAAM, made sure Minh never forgets that day outside the House of Sovereigns.
Honored the memory of Zeta Squad in 10 matches of Versus.
Completed "RAAM's Shadow" in 4 player co-op.
Completed "RAAM's Shadow" in Standard Campaign.
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.
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.
Defeated the first 10 waves of Horde with every member of Zeta in your party.
Level 100 and going back for more!
Won a Versus multiplayer match as a team of five Recruit Claytons (any mode).
Won a Versus multiplayer match as a team of five Savage Marauders (any mode).
Completed all 12 waves of Beast on all Fenix Rising maps.
Completed all 50 waves of Horde on any of the Fenix Rising maps.
Achieve level 100 a second time and choose to re-up for another tour.
Earned all 132 combat ribbons.
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.
Completed all 12 waves of Beast on all Forces of Nature maps.
Still standing after 20 waves - you're a natural!
Maxed out all of the Horde fortifications.
Found the right man for the job!
Win a match of Guardian on all Forces of Nature maps.