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 Bronze "Force Multiplier" medal.
Your respect for the dead earned you access to Griffin's special weapons stash.
Reached level 50.
Earned the Silver "Number 1" medal.
Complete all Acts in Co-op on any difficulty.
Completed all campaign Acts on Hardcore Difficulty.
Completed all campaign Acts on Insane Difficulty.
Survived all 50 waves of Horde.
Earned an Onyx medal.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Recovered all 42 Collectibles.
Recovered all 15 COG Tags.
Recovered 20 of 42 Collectibles.
Executed your enemies with variety and style.
Completed 5 Arcade Campaign chapters in co-op.
Completed all campaign Acts on Casual or Normal Difficulty.
Killed Myrrah.
Rescued Adam Fenix from captivity.
Reached level 25.
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.
Defended Anvil Gate from the Locust siege.
Arrived safely, kinda, at Anvil Gate.
Grabbed a Locust Gas Barge to travel to Anvil Gate.
Discovered the location of Adam Fenix.
Completed one match in all six Versus multiplayer modes.
Blew up the Lambent Leviathan from the bridge.
Defended and escaped from Cougar Stadium.
Your skill and experience means you’re ready for Standard Versus multiplayer.
Earned the Bronze "Loot Courtesan" medal.
Wreaked vengence upon humanity!
Reached level 15.
Recovered 5 of 42 Collectibles.
Found food and ammo in Hanover.
Defended the Raven's Nest from Lambent Leviathan.
Woke up from a bad dream.
Reached level 10.
Completed the first 12 waves of Beast.
Survived the first 10 waves of Horde.
Reached level 5.
Executed an infected player and is now turning Lambent.
Killed 10 enemies in Team Deathmatch.
Reach level 100 and earn every Onyx medal.
Earn the Onyx "War Supporter" medal.
Found new places to destroy all humans.
We are the elite Onyx Guard!
Showed your friends the Horde Command Pack sights.
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 4 player co-op.
Honored the memory of Zeta Squad in 10 matches of Versus.
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 Arcade Campaign.
Completed "RAAM's Shadow" in Standard Campaign.
Showed 50 Locusts the meaning of sky-fire with HOD Command Center.
As RAAM, ripped 50 Gears to shreds with your Kryll.
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 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.
Complete all 12 waves of Beast on all Fenix Rising maps.
Achieve level 100 a second time and choose to re-up for another tour.
Earned all 132 combat ribbons.
The $!*@# was taken down with extreme force.
Completed all 50 waves of Horde on any of the Forces of Nature maps.
Still standing after 20 waves - you're a natural!
Led by example and killed 10 opponents as Guardian leader.
Found the right man for the job!
Cleaved 25 enemies with a hidden weapon.
Captured and "released" 20 opponents as the Savage Hunter.
Maxed out all of the Horde fortifications.
Complete all 12 waves of Beast on all Forces of Nature maps.
Win a match of Guardian on all Forces of Nature maps.