Full list of all 37 Night at the Museum 2 achievements worth 1,000 gamerscore. It takes around 3-4 hours to unlock all of the achievements on Xbox 360.
Obtained all Awards in the Awards Room
Defeated Kahmunrah
All Museums Explored
Acquired the Pressed Penny Collectible in ALL Museums
Acquired the Pressed Penny Collectible in Lincoln Memorial
Completed Lunar Lander sequence with at least Two Bars of Health Remaining
Completed National Air and Space Museum: Hangar
Completed National Museum of Natural History
Returned the Hope Diamond
Acquired the Pressed Penny Collectible in National Museum of Natural History
Completed the Trilobite Puzzle in the National Museum of Natural History
Collected 100% of Hidden Items
Acquired all "Bone" Collectibles
Tamed all Animals
Completed Anubis Columns Puzzle
Completed Washington Art Museum
Acquired the Pressed Penny Collectible in Washington Art Museum
Acquired all "Paint Tube" Collectibles
Repaired all Broken Exhibits in Washington Art Museum
Activated all Paintings Traps in the Washington Art Museum with the Flashlight
Acquired all "Wrench" Collectibles
Completed the Autogyro Flight
Restored Power to Amelia Earhart's Plane
Gave the Gum to Stonehead
Acquired the Pressed Penny Collectible in National Air and Space Museum
Completed National Air and Space Museum: Able Chase
Acquired all "Pilot's Wings" Collectibles
Navigated the Vending Machine
Freed Able from her Restraints
Escaped Federal Archives
Acquired the Pressed Penny Collectible in Federal Archives
Acquired all "Souvenir Document" Collectibles
Acquired the Pressed Penny Collectible in Smithsonian Castle
Acquired all "Postcard" Collectibles
Acquired the Pressed Penny Collectible in New York Museum of Natural History
Completed Tablet Tutorial at New York Museum of Natural History
Acquired all "Museum Magnet" Collectibles