I'd have to agree with several of the replies and go with either the sweet and eire logo scene of Chakan : The Forever Man, or the interactive Vectorman 1 logo, where you could shoot the hidden TV in the upper right hand corner and get the super-blast and make the lights go out completely on the sega without just shooting it.
Been breaking out the genesis a lot lately, great to see some similar advertising now days to that of the Genesis day's by Sega.
IIRC, you have to get underneath it and hit it a certain amount of times, then some stuff will fall from the sky. You have to catch all of them and you get something, I'm not sure if it's invincibility or infinite lives or something.
Oh! Have you guys scene the one for panic?LOL...i thought that one was funny even though it was for Sega CD.
Just wanted to clarify my code...I knew I had it mixed up....from Gamefaqs.com:
When you turn on the game you can move Vectorman around, on the SEGA screen. Shoot the SEGA logo 24 times, jump and hit the sega logo with Vectorman's Head 12 times, and the letters S E G and A will start falling. Catch 90 to 110 letters to start on Stage 5, catch over 110 letters to start on Day 10.
There you have it.....
Oh and I found one more, in case anyone cares....
At the SEGA screen, move Vectorman slightly to the right of the logo. Aim upwards and shoot. There is a hidden T.V. monitor there. Once it is broken, there will be an orb power up. Grab it and when you use it, the SEGA logo will go dark and the background will stop moving.