In many ways, Fez reminded us of Portal. Both create moments of supreme frustration in the player at the limits of knowledge and understanding, and both provide exceptional payoffs when the player finally overcomes those hurdles. If you were willing to play the game and truly get involved, Fez rewarded you time and time again. With its simple conceit (and fantastic execution), Fez took a commendably mature approach to letting you discover things for yourself. It was a flawed work of brilliance to be sure (*cough* patches), but brilliance nonetheless.
And now it costs less than a pint on PS4.
UPDATE: The price doesn't seem to be showing for some, but if you add to basket it should show as £2.49. Cheers J.