8. PS3 Baby
Hey, if you just made a commercial about a doll that now makes Chucky from Child's Play look like Woody from Toy Story, you have screwed up bad. Gamers, by and large, do not want to have night terrors inspired by your commercial. If it's at the service of the product, that's understandable (maybe you're advertising Amnesia or something), but in the past 5 years or so, I have yet to see a creepy crying baby doll anywhere near a PS3. Blatant false advertising, thank goodness.
7. Atari Jaguar
The Jaguar is 64 bits, therefore it is literally 4 times as good as the Super Nintendo (which is 16 bits), right? Yeah, it must be, because I did the math! Except, ya know, the Jaguar isn't exactly 64 bits, so the entire premise of the commercial and the edging-towards-a-nevous-breakdown teacher starts to fall apart pretty quickly. The Jaguar had a two 64-bit chips, but also a couple 16-bit and 32-bit chips. The end result was something less than advertised. But if there's any way to advertise videogames to kids, it's by having a teacher scream at them over and over with no regard for facts. Videogame Marketing 101, people.
6. Nintendo 64 Games
Hey kids! Nintendo has a bunch of fun, cool games (just trust us, we're not gonna show you any gameplay) - and you should blackmail your parents into buying them for you! Maybe your dad is a secret transvestite! Use your intimate knowledge of his darkest secrets to extort him for like 40 bucks! It sounds crass, but betraying the trust of a parent in exchange for Super Smash Bros. is actually a small price to pay.
5. The Legend of Zelda
So, people like Zelda, right? It's a fun game? Cool, let's show a guy with proto-Kramer hair randomly screaming Zelda words, striking poses, and bellowing "ZELDA!" over and over for no conceivable reason. Nintendo had the 20 year old German expressionist filmmaker demographic down cold with this one.