- Green as Grass: Train the rook (any difficulty).
- It's a Trap! Story progression in Act 1, Chapter 2.
- Escort Service: Story progression in Act 1, Chapter 4.
- Girl About Town: Story progression in Act 1, Chapter 6.
- That Sinking Feeling: Story progression in Act 2, Chapter 4.
- Freebaird! Story progression in Act 2, Chapter 5.
- Heartbroken: Story progression in Act 2, Chapter 6.
- Longitude and Attitude: Story progression in Act 3, Chapter 3.
- Tanks for the Memories: Story progression in Act 3, Chapter 4.
- Water Sports: Story progression in Act 3, Chapter 6.
- There's a Time for Us: Story progression in Act 4, Chapter 2.
- Better Wrapped in Beacon: Story progression in Act 4, Chapter 3.
- Have Fun Storming the Castle: Story progression in Act 4, Chapter 6.
- And the Horsey You Rode in On: Story progression in Act 5, Chapter 1.
- You Are the Support, Son: Story progression in Act 5, Chapter 2.
- Brumak Rodeo: Story progression in Act 5, Chapter 4.
- Does This Look Infected to You? Story progression in Act 5, Chapter 5.
- Tourist of Duty: Complete all campaign acts on Casual Difficulty.
- Guerilla Tactician: Complete all campaign acts on Normal Difficulty.
- Artist of War: Complete all campaign acts on Hardcore Difficulty.
- Suicide Missionary: Complete all campaign acts on Insane Difficulty.
- Collector: Recover 5 collectibles (any difficulty).
- Pack Rat: Recover 20 collectibles (any difficulty).
- Completionist: Recover all 41 collectibles (any difficulty).
- One-Night Stand: Complete 1 chapter in co-op on any difficulty (Marcus or Dom).
- Open Relationship: Complete 10 chapters in co-op on any difficulty (Marcus or Dom).
- Friends with Benefits: Complete all acts in co-op on any difficulty (Marcus or Dom).
- Once More, With Feeling: Perform 30 perfect active reloads (any mode).
- Takes a Licking: Melee 30 Tickers (any mode).
- Organ Grinder: Kill 30 enemies with a cover mounted Mulcher (any mode).
- Shock and Awe: Kill 30 enemies with the heavy Mortar (any mode).
- Said the Spider to the Fly: Kill 10 enemies with a planted grenade (any mode).
- Crowd Control: Melee 10 enemies down with the Boomshield equipped (any mode).
- Smells Like Victory: Kill 30 enemies with the Scorcher Flamethrower (any mode).
- Variety Is the Spice of Death: Kill an enemy with every weapon in the game (any mode).
- Seriously 2.0: Kill 100,000 enemies (any mode).
- Standing Here, Beside Myself: Win 3 matches of Wingman (public).
- Beat the Meatflag: Capture 10 meatflags in Submission (public).
- It's Good to be the King: Win 10 rounds of Guardian as the leader (public).
- You Go Ahead, I'll Be Fine: Win three matches of King of the Hill (public).
- Back to Basic: Successfully complete the 5 lessons of multiplayer Training Grounds.
- Party Like It's 1999: Play 1999 rounds of multiplayer (any mode).
- Around the World, Again: Win a multiplayer match on each map (any mode).
- Dirty, Dirty Horde: Survive the first 10 waves of Horde (any difficulty, any map).
- Hoard the Horde: Survive all 50 waves of Horde (any difficulty, any map).
For the complete low-down on Gears of War 2, head over to our preview.

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