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.
Woke up from a bad dream.
Earned the Bronze "Force Multiplier" medal.
Earned the Onyx "War Supporter" medal.
Reached level 50.
Complete all Acts in 4 player Co-op on any difficulty.
Completed all campaign Acts on Hardcore Difficulty.
Completed all campaign Acts on Insane Difficulty.
Recovered all 15 COG Tags.
Recovered all 42 Collectibles.
Complete all Acts in Co-op on any difficulty.
Your respect for the dead earned you access to Griffin's special weapons stash.
Recovered 20 of 42 Collectibles.
Earned an Onyx medal.
Executed your enemies with variety and style.
Survived all 50 waves of Horde.
Wreaked vengence upon humanity!
Completed one match in all six Versus multiplayer modes.
Completed all campaign Acts on Casual or Normal Difficulty.
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.
Defeated the Lambent Berserker.
Defended Anvil Gate from the Locust siege.
Arrived safely, kinda, at Anvil Gate.
Reached level 25.
Killed 10 enemies in Team Deathmatch.
Killed Myrrah.
Rescued Adam Fenix from captivity.
Defended and escaped from Cougar Stadium.
Recovered 5 of 42 Collectibles.
Found food and ammo in Hanover.
Defended the Raven's Nest from Lambent Leviathan.
Drove from Anvil Gate to Mercy.
Completed the first 12 waves of Beast.
Earned the Bronze "Loot Courtesan" medal.
Reached level 15.
Survived the first 10 waves of Horde.
Maxed the Consecutive Match Bonus in Versus multiplayer.
Reached level 10.
Grabbed a Locust Gas Barge to travel to Anvil Gate.
Completed 5 Arcade Campaign chapters in co-op.
Discovered the location of Adam Fenix.
Blew up the Lambent Leviathan from the bridge.
Executed an infected player and is now turning Lambent.
Reached level 5.
Your skill and experience means you’re ready for Standard Versus multiplayer.
Earn the Silver "Number 1" medal.
Reach level 100 and earn every Onyx medal.
We are the elite Onyx Guard!
Host a private Horde Match with a party of 5 players on any Horde Command Pack map (any difficulty).
Host a private Beast Match with a party of 5 players on any Horde Command Pack map (any difficulty).
The Hammer of Dawn is now online!
Get 500 Silverback rocket kills in Horde (any map, any difficulty).
Completed "RAAM's Shadow" in Arcade Campaign.
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.
As RAAM, ripped 50 Gears to shreds with your Kryll.
Complete "RAAM's Shadow" in Standard 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.
Using the Loader, kill 10 Locust.
Defeated the first 10 waves of Horde with every member of Zeta in your party.
Level 100 - so nice, I did it twice.
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).
Level 100 and going back for more!
Completed all 12 waves of Beast on all Fenix Rising maps.
Completed all 50 waves of Horde on any of the Fenix Rising maps.
Earn at least one of each of the original 132 combat ribbons.
Captured and "released" 20 opponents as the Savage Hunter.
Maxed out all of the Horde fortifications.
Still standing after 20 waves - you're a natural!
Cleaved 25 enemies with a hidden weapon.
Completed all 50 waves of Horde on any of the Forces of Nature maps.
Found the right man for the job!
Complete all 12 waves of Beast on all Forces of Nature maps.
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.
Kill a Lambent Berserker with a team comprised of 5 Forces of Nature characters in Horde.