WHAT DOES D20 MEAN?

With the release of the 4th edition of Dungeons & Dragons in 2008, Wizards in the Coast revoked the more info first d20STL, replacing it with a new license especially for D&D, called the Game method License. The terms of this license are much like the d20STL, but there's no affiliated OGL or open up material, and the 4th-edition SRD simply lists th