This is not my work by any means, but I just found these awesome speed runs of several versions of Ninja Gaiden (available below, as well). If you aren’t familiar with Ninja Gaiden, it’s a series of some of the harder games you play – probably something like a modern Ghost n’ Goblins. If you aren’t familiar with speed runs, well, you can see more examples all over the web.
[gamevideo 11798 Ninja Gaiden NES] Ninja Gaiden I (NES)
[gamevideo 11799 Ninja Gaiden II: The Dark] Ninja Gaiden II: The Dark
[gamevideo 11800 Ninja Gaiden III: The Ancient Ship of Doom] Ninja Gaiden III: The Ancient Ship of Doom
[gamevideo 11802 Ninja Gaiden Black (XBox)] Ninja Gaiden Black (XBox)