Cogs

Cogs is built on a number of puzzles that mimic sliding block puzzles. Each level, representing some three-dimensional object, has various objectives, but generally involve moving tiles to connect sets of gears, piping, and other physical elements to make that object behave in a specific manner, such as providing gear power to turn wheels. As objects are three dimensional, the player may need to manipulate puzzles on multiple faces or faces that wrap around the object, or consider the front and back-sides of tiles. The player is free to rotate the virtual object to identify how to arrange the tiles correctly.

The basic physical elements that the player may need to manipulate include: gears which can turn other gears it is meshed with as well as transmission gears of different sizes that affect the rate of rotation of subsequent gears; pipes which carry (coloured) steam or gas, which may be necessary to drive motors for the gears or fill balloons; and bell strikers, which must be set at the right time to make a specific melody for the puzzle. Early puzzles features one type of mechanic, but later puzzles may include many of these spread on multiple faces.

Cogs was, in 2010, the Grand Prize Winner at the Indie Game Challenge, in the professional category, having also received the Achievement in Art Direction and Achievement in Gameplay on the same contest. The game was also a finalist at the 2010 Independent Games Festival and 2009 IndieCade Cogs was one of thirteen games that were part of the alternative reality game, the Potato Sack that preluded the release of Portal 2; during this time, additional puzzles relating to the Potato Sack and Portal 2 were added to the game.