Allowed Classes: Barbarian, Bard, Cleric, Fighter, Psion, Psychic Warrior, Ranger, Rogue
Restricted Classes: Druid, Gladiator, Monk, Paladin, Sorcerer, Templar, Wizard
Restricted classes are treated in Red Age as though they were prestige classes, with requisites that make them impossible to select by beginning characters. Through the course of the story, these classes may or may not be opened to player access, according to the events of the game - just as any other prestige class would be.
Psionics are an integral part of the Dark Sun mythos. Magic is a malignant, profane force of corruption and is largely to blame for the ruin of the world - but in its place, the Way has risen to establish an epic fantasy foundation on Athas. Every being on Athas has a little awareness or the Way; it's simply that powerful and prevalent.
Because of this, the Psion and Psychic Warrior classes are handled differently than in other settings. Every player chooses one or the other for his character during character creation. This choice is final and may not be adjusted later during play unless, of course, the story suggests it. This class is treated as a second favored class. The class need not have any character levels invested in it, it must merely be chosen.
There have been renamings for the sake of semantics. For example, psionic power points are renamed the Way; every being with at least 4 points of Intelligence (meaning, every sentient being) has at least 1 point of the Way.
All Dark Sun characters may purchase level 1 psionic powers through the use of the Expanded Knowledge feat, as though they had obtained manifester level 3.
Finally, the psion subclasses have been largely renamed. Each subclass is recognized throughout Athas by these names, as opposed to the name "psion":