There are three playable characters in Forgotten Realms: Demon Stone, each with his or her own unique abilities. The human fighter Rannek is a master of melee combat. Illius, a sorcerer, casts spells to protect his friends or attack his enemies. A half-drow, half-wood-elf rogue named Zhai easily vanishes into the shadows before sneaking up on her enemy for the kill.
The two villains are equally enemies of the heroes and of each other. The first villain —Ygorl—is the leader of the Slaad army. Cireka, general of the Githyanki, is the second. The game's introduction explains that the only thing keeping each of them from taking over the realm is their hatred of each other. Fearing that the realm would be at the mercy of whichever villain was victorious, the great mage Khelben Blackstaff sealed them both within a Demon Stone.
The story develops as the three heroes battle two orc armies near the jewel-rich Gemspark Mines. A great red dragon, sent by Ygorl, leads the group to these mines. Once there, they unwillingly release Ygorl and Cireka from the Demon Stone and into the world. The three heroes must undo their mistake by joining forces to right the wrong they caused ...before the realm is lost.
Players have control over all three characters and can change character at any time (after all three main heroes arrive). There are many fighting moves, and players must use each character's skills to play the game effectively. Rannek uses a sword and breaks things with his gauntlets. Illius fights with a staff and uses magic (the game's most powerful ranged attack; the other two can throw knives (Zhai) or axes(Rannek)). Zhai uses two daggers and becomes invisible in shadows—this is useful for sneaking up on enemies and killing them. Bosses overpower characters in one-on-one fighting but can be defeated with the combined power of all three heroes. Although much of the game is hack-and-slash, there are several tasks that require the use of various skills."
Source: Wikipedia, "Forgotten_Realms:_Demon_Stone," available under the CC-BY-SA License.