An Underrated Masterpiece.
Based on the Pen-and-Paper RPG by White Wolf called "World of Darkness" comes Vampire: The Masquerade Bloodlines on the PC. It is the first game non-valve game to use the Source Engine. The game was released with major bugs and slowdowns (specifically outdoor environments). Despite that, it is still is a rich world to explore. With the fan community constantly updating the game with patches, it just keeps getting better and better.
The combat is rather clunky and guns do hardly any damage, melee is the only way to go. Though the combat is an important part of any game, it can be excused in this game because of the absolutely breathtaking world to explore, the amazing dialogue, and an incredible story. Tell me a game where you can have an argument with a stop sign?
Vampire: The Masquerade - Bloodlines is a great RPG even till this day. It will be known as Troika's best and last game ever.