Super Metroid
I got lost in Maridia for, like, a week and a half because of this fuckin' thing. I swear to god, when I Power Bombed it, it didn't break. I had to use a less-powerful Super Missile instead? And then there's the Maridia boss, Draygon. Don't get me started on Draygon. Jesus.
I can see how Super Metroid was one of the greatest things ever back in 1994, but 16 years on, its age definitely shows. There're no two ways about the controls -- they suck. (Space Jump? Impossible!) And the game has more than its share of hidden things, from boss techniques to knowing where to go, that are in dire need of a hint system.
Both of these issues were handily solved in Metroid Prime and Metroid Fusion.
So, sure, I can appreciate Metroid's roots here. But I also appreciate the improvements that have come since.
Progress: Got the Screw Attack