I'm reading through the 13th Age PDF for the first time and on page 30, it says that "13 th Age is less restrictive than other d20 games, and your racial choice won’t limit your class selection."
What d20 games feature racial limitations on classes? I can't think of any. Oldschool D&D can't possibly count since it's not a d20 game, although I guess retro-clones could. What could they be referring to?