Er is een lijst verschenen met de mogelijke achievements voor Gears of War 2. In tegenstelling tot het eerste deel lijken de meeste achievements wel haalbaar. Alleen de achievement "Seriously 2.0" zal een pittige opgave worden.

• Ain’t Too Proud To Beg (10) – Crawl to a teammate and be revived
• And The Horse You Rode In On (10) – Story progression in Chapter 15
• Around The World (30) – Win one match on each of the 12 MP maps
• Back To Basic (20) – Complete Multiplayer Training Grounds
• Be Vewwy Vewwy Quiet (10) – Story progression in Chapter 12 (passive)
• Blowed Up Real Good (10) – Kill three enemies with a single grenade tag
• Brumak Rodeo (10) – Story progression in Chapter 17
• Can Do It All (30) – Win a match of every multiplayer game type
• Commander (150) – Complete all campaign acts on Insane difficulty
• Commissioned Officer (75) – Complete all campaign acts on Hardcore difficulty
• Completionist (30) – Recover all 43 Collectibles (any difficulty)
• Crossed Swords (10) – Win a Chainsaw Duel
• DIY Turret (10) – Use a cover-mounted Gatling gun to kill three enemies without dismounting
• Does This Look Infected To You? (10) – Story progression in Chapter 18
• Dom-Curious (10) – Complete one chapter in co-op on any difficulty
• Domination (30) – Complete ten chapters in co-op on any difficulty
• Escort Service (10) – Story progression in Chapter 3
• Freebaird! (10) – Story progression in Chapter 6
• Girl About Town (10) – Story progression in Chapter 4
• Green as Grass (10) – Train the rook (any difficulty)
• Have Fun Storming The Castle (10) – Story progression in Chapter 14
• Heartbroken (10) – Story progression in Chapter 7
• I Can’t Quit You, Dom (50) – Complete all acts in co-op on any difficulty
• It Takes Two (10) – Win Wingman with both team members alive
• It’s A Trap! (10) – Story progression in Chapter 2
• It’s Good To Be The King (10) – Finish a winning round of Assassination as the leader
• Longitude and Attitude (10) – Story progression in Chapter 8
• Multi-Talented Executioner (30) – Execute a downed enemy with every weapon in the game
• Non-Commissioned Officer (50) – Complete all campaign acts on Normal difficulty
• Pack Rat (15) – Recover 20 Collectibles (any difficulty)
• Photojournalist (10) – Submit a spectator photo
• Pound of Flesh (10) – Use a meat shield to absorb a killing blow
• Reservist (25) – Complete all campaign acts on Casual difficulty
• Said The Spider To The Fly (10) – Kill an enemy with a planted grenade
• Saved Maria (10) – Story progression in Chapter 11
• Seriously 2.0 (50) – Kill 100,000 enemies, total, across all modes
• Shake and Bake (10) – Kill three enemies with the flamethrower without reloading
• Shock and Awe (10) – Use the mortar to kill three enemies with a single shot
• Survived To Five (20) – Entire team must survive the first five waves of Horde (any difficulty)
• Survived To Ten (30) – Entire team must survive the first ten waves of Horde (any difficulty)
• Tanks For The Memories (10) – Story progression in Chapter 9
• That Sinking Feeling (10) – Story progression in Chapter 5
• The Old Ball and Chain (10) – Capture a Meat Flag in a winning match of Meat Flag
• They Just Keep Coming (10) – Story progression in Chapter 16
• Tourist (5) – Recover 5 Collectibles (any difficulty)
• Variety is the Spice of Death (30) – Kill an enemy with every weapon in the game
• Water Sports (10) – Story progression in Chapter 10
• We’re Hunting Rabbit (10) – Story progression in Chapter 12 (aggressive)
• Wrapped In Beacon (10) – Story progression in Chapter 13
• You Go Ahead, I’ll Be Fine (10) – Collect all the rings value in a winning round of KOTH