I’m using the d20 Game System from AD&D to give me ideas for a project. I was wondering if anyone knows if there are legal issues I should be watching out for.
For instance the basic system of die rolls for turn play, can I get in trouble for making a game that works similar to the AD&D system? If I choose to use the races and classes that are described in the AD&D system can I get in trouble? Neverwinter Nights uses a lot of the D&D ideas but I don’t see anything stating that they had to license those specific areas of D&D.