Publisher blurb: A dark star fell from the sky bringing with it the end of all things! The sanctity of the world known as Abaddon was shattered when a global apocalyptic event of a meteor impacting the planet causing a destructive ecological and eldritch change. Now there is no day or night, just never ending twilight. An undead world ruled by fear and horror. Undead nightmares prowl the darkest forest with malevolent ghouls, grim demonic fiends and horrific vampires prey on a fearful populace. The world is dominated by the monstrously powerful immortal vampiric lich lord known as Calix Sabinus reigns supreme over this world. And with all this the mysterious force known as Nightwall. Evil dominates the world to be challenged by noble heroes fighting to take back a world that should belong to them. Are you willing to take up the fight? Inside this book you will find you’ll need to embark on adventures in the exciting setting of Obsidian Twilight: * 8 new races usable as player characters or NPCs. * Over 100 new feats, over 140 new spells and 6 new prestige classes. * New monsters and monster template. * Highly detailed regions and history, new organizations to launch your campaign Players assume the roles of brave adventures facing ultimate evil in the hopes of saving the world, all in a postapocalyptic setting of survival horror and adventure.