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.
Earned the Bronze "Force Multiplier" medal.
Wreaked vengence upon humanity!
Executed your enemies with variety and style.
Earned the Onyx "War Supporter" medal.
Survived all 50 waves of Horde.
Earned the Bronze "Loot Courtesan" medal.
Earned an Onyx medal.
Completed all campaign Acts on Insane Difficulty.
Completed 5 Arcade Campaign chapters in co-op.
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.
Killed Myrrah.
Rescued Adam Fenix from captivity.
Recovered all 42 Collectibles.
Recovered all 15 COG Tags.
Turned off the Maelstrom device.
Passed under the Maelstrom and found Azura.
Launched the sub.
Found enough fuel to get to Endeavor naval base.
Survived the first 10 waves of Horde.
Found and activated the fuel pump.
Drove from Anvil Gate to Mercy.
Defeated the Lambent Berserker.
Defended Anvil Gate from the Locust siege.
Reached level 50.
Completed one match in all six Versus multiplayer modes.
Arrived safely, kinda, at Anvil Gate.
Recovered 20 of 42 Collectibles.
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.
Recovered 5 of 42 Collectibles.
Defended the Raven's Nest from Lambent Leviathan.
Woke up from a bad dream.
Reached level 25.
Completed the first 12 waves of Beast.
Reached level 15.
Reached level 10.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Reached level 5.
Executed an infected player and is now turning Lambent.
Killed 10 enemies in Team Deathmatch.
Your skill and experience means you’re ready for Standard Versus multiplayer.
Complete all Campaign Acts in 4 player Co-op (any difficulty, Standard or Arcade).
Earn the Silver "Number 1" medal.
Reach level 100 and earn every Onyx medal.
We are the elite Onyx Guard!
Showed your friends the Horde Command Pack sights.
Found new places to destroy all humans.
Get 500 Silverback rocket kills in Horde (any map, any difficulty).
Achieve Level 4 in Horde Command Center fortifications.
Completed "RAAM's Shadow" in Standard Campaign.
As RAAM, ripped 50 Gears to shreds with your Kryll.
Ignored all Loader safety guidelines and killed 10 Locusts.
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.
Complete "RAAM's Shadow" in Arcade Campaign on any difficulty.
Complete "RAAM's Shadow" in 4 player co-op in either Arcade or Standard mode.
As Mauler, kill 10 Gears by reflecting their bullets using your shield.
Using the Hammer of Dawn Command Center, kill 50 Locust.
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 50 waves of Horde on any of the Fenix Rising maps.
Completed all 12 waves of Beast on all 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.
Still standing after 20 waves - you're a natural!
Completed all 12 waves of Beast on all Forces of Nature maps.
Cleaved 25 enemies with a hidden weapon.
Captured and "released" 20 opponents as the Savage Hunter.
Led by example and killed 10 opponents as Guardian leader.
Found the right man for the job!
Guardian is back!
Complete all 50 waves of Horde on any of the Forces of Nature maps.
Achieve the maximum level on all fortifications in Horde mode.
Kill a Lambent Berserker with a team comprised of 5 Forces of Nature characters in Horde.