I disagree that F-Zero GX's difficulty isn't frustrating. I finished the story mode on Normal, but the stress was way too much for me, so I had to put it away for a while. I went back and beat a few missions in Hard and a couple on Very Hard (the Red Canyon and Chain Gang ones, I think. I know I unlocked the Spark Moon and Fat Shark), but that was it. That game is the poster child of unfair unlockables. I paid for the game, and I want access to all of it, but it is beyond my ability to unlock a large chunk of it. Sure, I could go on a quest to find the AX version to unlock it, but I'd have an easier time finding the Holy Grail. Ever since F-Zero GX, my belief is that everything should eventually unlock even if you suck at the game. The extras could have been in the shop for an insane number of tickets, so that eventually, even a novice could beat the easiest cup enough times to unlock them.