This is the List of Achievements attainable for Gears of War on the Xbox 360. Original achievements provide 1,000 Gamerscore and DLC achievements provide 250 gamerscore.
| Prison Breakout | ||
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Completed tutorial level on any skill level | 10 
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| Completed Act 1 on Casual | ||
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Complete Act 1 on Casual Difficulty | 10
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| Completed Act 2 on Casual | ||
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Complete Act 2 on Casual Difficulty | 10
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| Completed Act 3 on Casual | ||
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Complete Act 3 on Casual Difficulty | 10
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| Completed Act 4 on Casual | ||
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Complete Act 4 on Casual Difficulty | 10
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| Completed Act 5 on Casual | ||
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Complete Act 5 on Casual Difficulty | 10
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| Completed Act 1 on Hardcore | ||
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Complete Act 1 on Hardcore Difficulty | 20
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| Completed Act 2 on Hardcore | ||
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Complete Act 2 on Hardcore Difficulty | 20
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| Completed Act 3 on Hardcore | ||
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Complete Act 3 on Hardcore Difficulty | 20
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| Completed Act 4 on Hardcore | ||
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Complete Act 4 on Hardcore Difficulty | 20
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| Completed Act 5 on Hardcore | ||
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Complete Act 5 on Hardcore Difficulty | 20
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| Completed Act 1 on Insane | ||
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Complete Act 1 on Insane Difficulty | 30
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| Completed Act 2 on Insane | ||
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Complete Act 2 on Insane Difficulty | 30
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| Completed Act 3 on Insane | ||
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Complete Act 3 on Insane Difficulty | 30
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| Completed Act 4 on Insane | ||
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Complete Act 4 on Insane Difficulty | 30
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| Completed Act 5 on Insane | ||
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Complete Act 5 on Insane Difficulty | 30
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| Mercenary | ||
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Complete all acts on Casual Difficulty | 10
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| Soldier | ||
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Complete all acts on Hardcore Difficulty | 20
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| Commando | ||
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Complete all acts on Insane Difficulty | 30
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| My Love for You Is Like a Truck | ||
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Defeat a Berserker on Hardcore Difficulty | 20
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| Broken Fingers | ||
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Defeat a Corpser on Hardcore Difficulty | 20
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| A Dish Best Served Cold | ||
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Defeat General RAAM on Hardcore Difficulty | 20
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| Dom-curious | ||
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Complete 1 co-op chapter as Dominic Santiago on any difficulty | 10
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| Domination | ||
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Complete 10 different co-op chapters as Dominic Santiago on any difficulty | 20
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| I Cant Quit You Dom | ||
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Complete all acts in co-op as Dominic Santiago on any difficulty | 30
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| Time to Remember | ||
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Recover one-third of the COG Tags (on any difficulty) | 10
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| Honor-Bound | ||
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Recover two-thirds of the COG Tags (on any difficulty) | 20
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| For the Fallen | ||
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Recover all of the COG Tags (on any difficulty) | 30
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| Zen and the Art of Reloading | ||
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Perform 25 perfect active reloads (on any difficulty) | 10
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| Zen and the Art Part 2 | ||
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Perform 5 perfect active reloads in a row (on any difficulty) | 20
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| Clusterluck | ||
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Kill 3 enemies at once 10 different times (on any difficulty) | 20
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| Always Remember Your First | ||
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Finish playing a versus ranked match | 10
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| Dont Hate the Player | ||
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Finish with the highest points in a ranked match | 10
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| Mix It Up | ||
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Win a ranked match in every versus game type | 20
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| Around the World | ||
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Win a ranked match on every versus map | 30
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| Cant Touch Me | ||
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Win 10 ranked matches without losing a round | 10
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| A Series of Tubes | ||
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Host and complete 50 ranked matches | 20
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| Its a Massacre | ||
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Kill 100 enemies in ranked matches with the Chainsaw | 10
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| Dont You Die On Me | ||
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Revive 100 teammates in ranked matches | 10
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| The Money Shot | ||
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Kill 100 enemies in ranked matches with a headshot | 20
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| Curb Appeal | ||
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Kill 100 enemies in ranked matches with the curb stomp | 20
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| Capital Punishment | ||
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Kill 100 enemies in ranked matches with an execution | 20
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| I Spy with My Little Eye | ||
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Kill 100 enemies in ranked matches with the Longshot | 20
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| Pistolero | ||
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Kill 100 enemies in ranked matches with a pistol | 20
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| The Nudge | ||
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Kill 100 enemies in ranked matches with the Torque Bow | 20
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| Dont Hurt Em | ||
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Kill 100 enemies in ranked matches with the Hammer of Dawn | 20
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| Fall Down Go Boom | ||
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Kill 100 enemies in ranked matches with the Boomshot | 20
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| Is It a Spider | ||
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Kill 100 enemies in ranked matches with grenade tag | 30
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| Seriously ... | ||
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Kill 10,000 people in versus ranked match total | 50
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DLC Achievements[]
| THIS! IS! ANNEX! | ||
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Complete 100 multiplayer matches of 3+ rounds in Annex and capture 3 objectives in each match | 40
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| Inconceivable! | ||
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Win 20 rounds of multiplayer matches in Annex by fewer than 5 points | 30
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| Nub Pwn3r | ||
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Win 20 rounds of multiplayer matches in Annex by shutting out the opposing team | 30
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| You Down With E.P.I.C? | ||
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Win a multiplayer match of 3+ rounds in any game type on 6 different downloadable maps | 30
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| Green Thumb | ||
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Win 20 multiplayer matches of 3+ rounds in any game type on the Garden multiplayer map | 30
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| All That Juice | ||
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Win 20 multiplayer matches of 3+ rounds in any game type on the Process multiplayer map | 30
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| Purdy Mouth | ||
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Win 20 multiplayer matches of 3+ rounds in any game type on the Bullet Marsh multiplayer map | 30
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| Mind The Gap | ||
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Win 20 multiplayer matches of 3+ rounds in any game type on the Subway multiplayer map | 30
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PC Exclusive Achievements[]
| Shock Therapy | ||
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Defeat a Brumak on Hardcore Difficulty (secret achievement) | 30
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Trivia[]
- The Shock Therapy achievement is the only achievement that isn't available for the Xbox 360 release, due to there not being a fight with a Brumak in the game.
- The achievement My Love For You Is Like A Truck is a reference to the movie Clerks, where a character makes the statement "My love for you is like a truck berserker". The method to unlocking it supports this as you have to kill a Berserker on Hardcore Difficulty.
- The achievement Is It A Spider? is a reference to the Rooster Teeth series Red Vs. Blue. In the season one episode Knock Knock. Who's There? Pain. the character Donut asks the characters Grif and Simmons "Is it a spider?" then tells them to get it off when a Plasma Grenade stuck to his head thrown by the character Tex.