Use the following level names with the map command.
Level
Map name
Original Hexen 2, with new features demo1
Eidolon´s Lair keep1
The Village of Turnabel keep2
The Duke´s Keep keep3
The Catacombs keep4
The Hall of the Dead keep5
Tulku tibet1
The Ice Caverns tibet2
The False Temple tibet3
Courtyards of Tsok tibet4
Temple of Kalachakra tibet5
Temple of Bardo tibet6
Temple of Phurbu tibet7
Palace of Emperor Egg Chen tibet8
Palace of Inner Chambers tibet9
The Inner Sanctum of Prævus tibet10
Intro (EGO version) thomas
Silly level with monsters and no exit monsters