"Because We May" is a brand new video game sale put together by a whole gang of indie game developers, who say they want to promote both their games and the online stores that let them control pricing. To that end, they've placed almost every great indie game from the last few years (no kidding) on sale, on the various app and game stores that you see above. Whether you're looking for games direct from their developers, on iOS or Android, or on the Mac App Store or Steam, there are tons of great sales for you to take advantage of, and probably more coming.
Let's spend $15, for example: Buy Bit Trip Runner from the developers for $3.99, pick up Waking Mars on the iPad for $1.99, grab Psychonauts on the Mac for five bucks, and pick up both Penny Arcade titles for $3.99. That's five great games for less than the price of a movie ticket.