Cogs Quick Play HD (GigaBoots.com)

Dan & Eric from GigaBoots.com engage in a puzzling trial with Cogs for the PC. Essentially a slider-puzzle game at it's heart, this game builds on top of that with piping, 3D, and musical elements that work well to distinguish itself from the rest. This game is available on Steam and was a part of the Humble Indie Bundle 3.