Doom was actually kind of a rarity in it's day, which probably helped its sales. Also of mention was the fact that there were no such thing as M rated games and it was both Doom and Mortal Kombat popularity that brought a ratings system to begin with.
There was a problem in the early 90s: companies such as Nintendo wanted to sell extremely profitable violent games without affecting their family console image, Joe Lieberman needed to appeal his voting base and irresponsible parents needed a little help when purchasing videogames for their kids, as the alternative of spending any time with them was just crazy talk.
Instead of either party actively trying to understand the nature and the role of society in violent videogames (or the medium as a whole), they instead decided on a quick and half-assed solution of yet another ratings system (such as those in movies and records). After some trial and error, a ratings system that allowed for a boost in profits without intellectual responsibility was born. Joe called it a victory, he almost became VP later on in life and since then M rated games have doubled, tripled, quadrupled in number, and sales just sky rocketed for most that tried (and Nintendo released
the awesome with their port for Mortal Kombat 2, bringing that green back were it belonged).
The system's rules are simple, just as in R rated movies you can have some content, but god forbid you show full content!, just enough content to sell (which is arbitrary). And kids can play them, so long as their parents
approve of them.
Who is the organization that regulates all this?, why the ESRB of course!, which is not governmental at all, because boo the government!, corporations have showed time and time again that they can totally self regulate themselves, as seen in the current recession and global warming.
You actually have to pay for the privilege, and not having your game reviewed usually means that it won't be sold by either consoles or distributors. The fees are just an offer you can't refuse!
If game costs are less than 250.000 dollars: $800
If game costs are more than 250.000 dollars: $4000
Like most completely legitimate-like businesses the government is kept away in as many parts of the system as possible: you can appeal their decision, but it would be to a committee made up of people from the industry. Their concerns are mainly about not getting any sex within the industry, because that might cause some heat. Violence of any type is A-OK.
this is ok
that's cool too
god willing, notice that just like in real massacres only bland mid 20s adults were killed, no kids whatsoever.