Multiverse

From Qwiki

The term multiverse can have many definitions. Here it is used to mean any and all worlds, dimensions or universes visited or inhabited by Quorlan. Anywhere Quorlan has been, currently is or can go is considered a part of the Quorlan multiverse.

To date, the Quorlan-related multiverse includes (but is not limited to) the following worlds:
The City of Greyhawk (Advanced Dungeons & Dragons)
The World of Krynn (Advanced Dungeons & Dragons)
Britannia (Ultima Online)
Azeroth (World of Warcraft)
The Forgotten Realms (Neverwinter Nights)
Paragon City (City of Heroes)
The world of Moridia