Avernum 6

Developer: Spiderweb Software
Website: www.avernum.com/avernum6/index.html
Price: $28.00 for the full game. Free Demo.

From the website:
The epic conclusion of the award-winning Avernum series. Travel into the strange subterranean land of Avernum, full of dungeons, labyrinths, and constant warfare. A final set of disasters threatens to destroy your homeland in a spasm of famine and warfare. Only you can help your people to get to safety before everything falls apart. As you wander the gigantic world of Avernum, you will experience:

• An enormous world. Hundreds of quests, dozens of dungeons and enemy fortresses, and multitudes of characters.
• A fascinating storyline, full of surprises, treachery, and epic battles.
• Many unique encounters. Not just mindless hack and slash. Many unusual enemies that will require clever tactics to defeat.
• Rich game system with over 50 spells and battle disciplines, many character building options, and powerful secret skills to unlock.
• Unique game world. Unique races and settings make Avernum different from any RPG out there.
• Experience with previous Avernum games is completely unnecessary to enjoy Avernum 6.