Realms of Arkania III: Shadows over Riva

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

Shadows over Riva (1997) is the third part of the glorious Realms of Arkania Trilogy...

Something sinister lurks in the seaside town of Riva. An evil force has subverted the city's leaders, and evil things lurk in the town's sewers. Explore the huge city, dungeons and even underwater regions in stunningly detailed 3D. Adjustable difficulty levels make the game as simple or as detailed as you like.

PC Gamer Editor's Choice (1997)
Fantastic story and excellent gameplay (Online Gaming Review, 1997)

The Realms of Arkania Trilogy

The Realms of Arkania games (Blade of Destiny, Star Trail and Shadows of Riva) deliver a prime example of the classical European fantasy universe. Based on Germany's most popular pen & paper role playing game, it was also the first German computer RPG series to get widely recognized outside of its home country. To this day it holds a stable hardcore fanbase that loves the games for their comprehensive adaption of the pen & paper ruleset and the believable medieval fantasy setting.