Fez. Have you played it? If not, are you ever going to play it?
Another opportunity to do so has presented itself today with the launch of Polytron's puzzle-platformer on PS3, PS4, and PS Vita for $12.99, or $9.99 for PS Plus members who purchase before April 2, 2014. Cross-Buy and Cross-Save support are present across all three systems.
It's only now I'm realizing I have played through Fez once, and only once -- and that was, jeez, nearly two years ago back when it first released on Xbox Live Arcade. Loved it then, continue loving the music to this day. Many of the puzzles will escape me, which means a replay is in order.