In the shadow of a Dark Sun
See Dark Sun Campaign Guide for most character creation guidelines, the listed changes here overrule the Campaign guide.
(note that dragon born, eladrin, and Tiefling are not on this list even though they appear in the campaign guide)
Any-non Divine power source class
You may choose up to one character theme as listed in the Dark Sun Campaign guide, themes from other sources will need to be approved on a case by case basis, also suggestions for home-brew content for themes will be considered as long as it fits the campaign setting and matches power levels of other choices available to players.
New characters are started at 2nd level currently, this will progress along with the party’s level.
Publishing a character backstory is suggested, especially after we push past the point of introductory adventures. If you have any questions about Athas that you feel I should answer please post them in the forum.