Here are some kick arse time attack videos in which people try to beat the game as fast as possible. It's not just NES, below I list more. If you're like me, the old video games mean child hood memories. Stuff I hadn't seen since I was 8 years old. Challenges I couldn't always beat.
These flawless looking videos made loading the emulator savestates over and over until the recording looks perfect. See the bottom of this page for the official site and how to look for your favorite game. The videos you see here are from google videos.
Mfried beats the complex game of zelda in 33 minutes
Beats Zelda in 26 minutes. I like mfried's a little better because this one, by Phil, uses bombs more than the sword to kill enemies. Still awesomethough.
Genisto beats game in 10:35 seconds using warps.
Even full length RPG games have been subject to time attacks. You can download super mario rpg legend of the 7 stars online.
This is a 4 hour time attack of the legendary game chrono trigger. It's great to use as a walkthough too =P. You can download chrono trigger online.
Not even PC shooter games can hide from time attack fanatics.
I almost didnt want to link this one because it's so dark. It's best to click the archive.org link below and get a better quality version. Morrowind III elders scrolls time attack in just 7 minutes.
For more info in how Time Attacks are made, how you can make one yourself, and how to get the games on your computer visit TasVideos.org, a site maintained by a kid. Also search Google Video and Youtube for your favorite game.
Checkout the JimmyR boredom page to find roms and emulators.
Note that TAS is a Time Attack website. It refers to TASVideos.org. You may need a bit torrent client like Azureus for best downloading results.