Super Puzzle Fighter II Turbo HD Fun Fact #1: Completing “Y” Mode on Hard is impossible. In fact, just defeating the first character is impossible.
Super Puzzle Fighter II Turbo HD Fun Fact #2: Getting the “destroy a 25-gem block in Arcade Mode” achievement is also impossible, as if you play it on Easy or Normal, the CPU character dies before you get there, and if you play on Hard or Expert, you die before you get there.
