rgrove0172 said:
Was it the master brainchild of WoTC to dominate the market?
That's pretty much it
The idea was that by releasing the core D&D 3rd edition (and later v3.5) rules in an open form (using a licence called the Open Game Licence, or OGL), other companies would write campaign settings, scenarios, and basically do an immense job of product support. This in turn would bring more players into using d20 as a single system. While not obligatory, the d20 logo license that allows companies to identify their products as being compatible includes a requirement to put on the cover of your product:
"Requires the use of the Dungeons & Dragons Player's Handbook, by Wizards of the Coast". (at least, something very much like that - I don't have a copy handy to check the exact phrasing)
So it was essentially a marketing exercise by WotC to sell more copies of the D&D PHB. And if they sold more PHBs, they then had more customers hooked to sell the official D&D product line to. Where before gamers were split between numerous systems, after d20 there was a huge influx of new players to the system - just as WotC had hoped.
As an offshoot, some companies started using the OGL-released d20 rules to create full systems (such as Mongoose with the Conan line), with no logo and no reference to D&D. There's an unfortunate tendancy for people to think of this as the "OGL System", when in reality OGL is just the licence it was released under, and the same licence used by other systems (for example RuneQuest). These non-logoed systems are standalone and often deviate in some ways from the base D&D rules that mean they are not 100% compatable (but certainly easy enough to tweak if you want to).
Incidently - Mongoose are now trying the same thing with RuneQuest, releasing the core RuneQuest rules under the very same Open Game Licence, which means third party publishers can publish supplements for the RuneQuest system and put a logo on the cover.
The logo licences used by both d20 and RuneQuest tend to be mutually beneficial - the smaller third-party publisher gets to identify their new product with an established line and gets a ready-made customer base, while the larger publisher sells more copies of their core book (and usually their own supplements as a knock-on effect).
The downside of all this is that *anyone* can publish a d20 supplement. That means that something with a d20 logo on it has absolutely no guarantee of quality. As you can imagine, in the few years it's been out there have been many (some would say too many) third-party publishers jumping on the d20 bandwagon, and it can get a little tricky finding the good ones in the huge mass of d20 material out there now
There. I think thats as concise as I can get it
