Might&Magic 2
Chaos Strikes Back
Wizardry: Bane of the Cosmic Forge
Pools of Darkness
Ultima Underworld
Dark Queen of Krynn
Baldur's Gate 1 (modded)
Baldur's Gate 2
Icewind Dale
Morrowind

Honourable mention:
The rest of the Gold Box games
Dark Heart of Uukrul
The Magic Candle
Darklands