As the headline immediately informed you with a great deal of clarity, Tyler Glaiel's tricksy puzzler, Closure, is finally coming to PC after its PSN debut, with a Steam release set for September 7th. Originally a free Flash release, Closure's weirdness is that each part of the monochromatic world only exists when there is a light shining on it. Just as popular digital download services cease to exist when you switch off your monitor, Closure's platforms and switches have no solidity unless they are illuminated. Trailer and more details below.
Eurogamer discovered that the PC version can be played in "any resolution", will have an unlockable dev commentary and comes bundled with the internal development tools. So, modding will be possible by anyone capable of getting to grips with those.
There you go then. Closure is coming to Steam.