Until Monday April 7, OUYA owners can get Polarity for 70% off. This takes the normally $5 title down to a crazy-low $1.50. This homage to Portal isn’t quite on par with the game it’s inspired by, but the color-shifting mechanic is a good one and it’s a fun game to play if you’re into brain-teasing puzzles. If you loved either Portal game and have an OUYA, this is a deal you won’t want to miss out on. As someone who’s only a minor fan of this sub-genre, I can say that it’s still fun and definitely worth taking a chance on at $1.50 if the free portion intrigues you.