I may have mentioned this before, but Zelda: A Link to the Past is probably my favorite game of all time. The pixel art, colors, music, and so on were just perfect. Anyway, I was randomly looking at Zelda-related stuff and stumbed onto this: https://gamedev.stackexchange.com/questions/8336/how-was-collision-detection-handled-in-the-legend-of-zelda-a-link-to-the-past
It discusses how collision detection in the game was handled. If you are looking for something random to learn, then this is what you need 
Cheers,
Kirupa
