Crazy Machines 2 is a puzzle video game developed by German studios Fakt Software and DTP Entertainment for Microsoft Windows, Nintendo DS, and iOS.

The 3D game relies heavily on in-game physics and utilises NVidia PhysX.

For any given puzzle, the player is provided with a collection of items e.g. ramps, springs, steam engines, electrical devices, gears, belts, and a large selection of other mechanical devices for converting and directing raw energy into useful motion.

On the completion of each puzzle, the player is rewarded with points and a gold, silver, or bronze lug nut.

"[3] IGN were less keen, saying, "The core gameplay mechanics are solid," but "Crazy Machines 2 is at times poorly constructed.