Warcraft 3 Reign of Chaos and the expansion pack The Frozen Throne.
It starts with a young prince Arthas, who is a young paladin under Uther. In a world full of orcs, undead, nightelves and unknown powers. The story is about Arthas, who is consumed by power and betrays his human race but there are several characters in their respective sides like an orc shaman named Thrall and Illidan Stormspirit a nightelf. Even if you can’t be bothered with playing the game there is always cheat codes because the only thing interesting is the lore. Certainly now the Warcraft lore is passed on in an MMO called World of Warcraft and you can learn more in wiki.