Dark Sun: Hidden Oasis
Extended Critical Hits: No powers, feats, or any other effects can grant a critical hit on anything but a natural 20. Only certain terrain effects and weapon breakage may grant critical hits on anything but a natural 20.
Forced Movement into Damaging Terrain: Forced movement into damaging squares does not cause damage until the start of the creature’s turn.
Magic Items: Inherent enhancement bonuses will be used so magical item bonuses will not apply. You will gain bonuses to your base character when you would normally get a magical weapon, armor, or item. For this reason, magical items will be very rare. Characters beginning above level 1 start with no magical items.
Wild Talents: Each character begins with a psionic wild talent determined randomly.
Weapon Breakage: When rolling a 1 on an attack roll, your weapon automatically breaks but you gain a free re-roll on the attack and may critically hit on an 18, 19, or 20.