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