Forgotten Realms: Demon Stone is a game with a story written by R.A. Salvatore about three adventurers who get involved in an inter-planar war.
Orc armies and the red dragon Caminus are raiding the Gemspark Mine in Damara. Three adventurers, Rannek, Zhai, and Illius take it upon themselves to save the civilians in the area and secure the mines. They join up and eventually defeat the warlord controlling the dominant army. Searching the area, they come across a mysterious stone and accidentally release the prisoners it contains: the Githyanki general Cireka and the slaad Ygorl. They summon their armies and resume an old fight.
Zhai takes them to her home, Cedarleaf, a wood elf village, only to find it under attack by Cireka's Gith. Ygorl intervenes, trying to steal Cireka's Silver Sword. The party escape to Blackstaff Tower to meet with Illius' mentor, Khelben "Blackstaff" Arunsun, who tells them that they need to go to a yuan-ti temple to Merrshaulk in Chult to find a demon stone that will re-imprison Cireka and Ygorl. Unfortunately, Ygorl shows up again vowing revenge and while the protagonists escape, Khelben disappears and Blackstaff Tower is reduced to ruins. The three find a portal to the yuan-ti temple and steal the demon stone.
They then go to Mithral Hall which is under attack by an army of trolls. They aid Drizzt Do'Urden and Clan Battlehammer in defeating the trolls and use the Underdark tunnels from the hall to get to an ancient Githyanki stronghold where they expect to find the two warring generals so that they can imprison them in the stone. Unfortunately, Ygorl sends them both through a portal to the dragon Caminus,'s lair. The dragon obeys Ygorl and kills Cireka, rendering the demon stone useless but Rannek takes Cireka's sword and slays the dragon in turn. Ygorl leads the trio back to Damara and then to Limbo and reveals that he manipulated them into joining together and bringing him Cireka's sword. They kill Ygorl and escape back to Cedarleaf where they find Khelben, unharmed. King Gareth Dragonsbane awards the three an area of "untamed land" as a reward.
Baldur's Gate • Baldur's Gate: Tales of the Sword Coast • Baldur's Gate II: Shadows of Amn • Baldur's Gate II: Throne of Bhaal
Icewind Dale series
Icewind Dale • Icewind Dale: Heart of Winter • Icewind Dale: Trials of the Luremaster • Icewind Dale II • Icewind Dale: Enhanced Edition
Neverwinter Nights series
Neverwinter Nights • Neverwinter Nights: Shadows of Undrentide • Neverwinter Nights: Hordes of the Underdark • Neverwinter Nights 2 • Neverwinter Nights 2: Mask of the Betrayer • Neverwinter Nights 2: Storm of Zehir • Neverwinter Nights 2: Mysteries of Westgate • Pirates of the Sword Coast • Infinite Dungeons • Wyvern Crown of Cormyr • Neverwinter Nights (AOL game) • Enhanced Edition
Dark Alliance series
Baldur's Gate: Dark Alliance • Baldur's Gate: Dark Alliance II
Eye of the Beholder series
Eye of the Beholder • Eye of the Beholder remake • Eye of the Beholder II: The Legend of Darkmoon • Eye of the Beholder III: Assault on Myth Drannor
Pool of Radiance series
Pool of Radiance • Curse of the Azure Bonds • Secret of the Silver Blades • Pools of Darkness • Pool of Radiance: Ruins of Myth Drannor
Savage Frontier series
Gateway to the Savage Frontier • Treasures of the Savage Frontier