Part 1 (Ruins of Stonekeep + Sewers)
Part 2 (Mines + Throggi Temple)
Part 3 (Dwarf Fortress + Fairy Realm)
Part 4 (Ice Caves + Gate of the Ancients + Palace of Shadows 1st half)
Part 5 (Palace of Shadows 2nd half + Khull-Khuum's Tower Bad Ending + Good Ending)