The man known as Dr. Octoroc, previously featured for his 8-Bit Jesus collection of Christmas chiptunes, re-imagines Joss Whedon's "Dr. Horrible's Sing-along Blog" project as "theoretical Nintendo game." It looks way better than Goonies II.
After watching the best 8-bit version of Neil Patrick Harris you'll ever see, head over to Dr. Octoroc's official site to grab the soundtrack, shower him with money and check out his other projects... and then shower him with money. And thanks to everyone who sent this in, but it was the Doc that beat you to it!
Dr. Horrible's Sing-A-Long Game [Dr. Octoroc]