Twilight of Atlantis is a 2001 role-playing game supplement for the d20 System published by Avalanche Press.
Twilight of Atlantis is a supplement in which a mythic, highâÂÂmagic empire on the brink of collapse is presented, offering new races, prestige classes, feats, and a resonanceâÂÂbased spellcasting system inspired by Plato's Atlantis for players seeking to saveâÂÂor toppleâÂÂthe doomed realm.