What makes an incredible puzzle game? To me, it needs to teach you its ideas through gameplay, and ramp up the challenge in a way that makes you forget you're even learning anything. Portal is the perfect example, but Superliminal expertly continues that approach to design, and it's one of my favorite experiences the genre has to offer. It's good that you can grab it for less than $7 right now, then - just don't wait around. Continue reading Beloved mind-bending puzzle game Superliminal is dirt cheap right now MORE FROM PCGAMESN: Best single-player games, Best puzzle games, Best indie games