Right now, for the next ~36 hours pretty much, Transistor is on sale for £3.74 or $5 USD or €4.74 or $5.49 CAD. In fact, you don't even need to search for it, click this. I take no responsibility for any vulgarity on the webpage I link to, for I do not control the whims of Steam users and do not desire to. Go buy this game, because it's a masterpiece in music and art with some very unique gameplay that rewards a fair bit of experimentation.