Here's my homage to the humble beginnings of my favorite game series of all time. I'm sure there's some sort of program to do this automatically, but I'm doing this block by block manually with a texture pack I'm making as I go. Should be roughly pixel-perfect to the original Metroid, other than a few variances such as the doors and slopes.

For now I'm just doing Upper Brinstar; might expand it to Kraid's Lair eventually or even the rest of Zebes if I feel super-masochistic.