Nihilumbra is a puzzle-platformer that originally lived in Apple's App store, where many people reacted positively to its shadowy atmosphere and bleak narrative. The Windows, Mac and Linux versions will be available on September 25th, and they include HD textures, a remastered soundtrack, completely rethought controls and voice acting. It's always pleasing to see interesting games making the leap from platform to platform, especially when they're heading in this direction and the folks involved put in the time to make their work suit the PC's qualities. Nihilumbra's central mechanic involves painting the landscape/platforms to change their function, as can be seen in the trailer below, which also includes footage of a world-eating void. Jolly.
Nihilumbra is also awaiting your vote on Steam Greenlight, should you wish to cast some affection in its direction.