Tegel Manor is a 1977 fantasy role-playing game adventure published by Judges Guild.

[4] Don Turnbull reviewed Tegel Manor for White Dwarf #3, and stated that "I have been fortunate enough to play this scenario and found it enjoyable – not wildly suspense-full or nail-bitingly exciting, but a novel change from the more familiar dungeon-setting.

"[1] In his 2023 book Monsters, Aliens, and Holes in the Ground, RPG historian Stu Horvath noted, "Tegel Manor is what has come to be known as a funhouse dungeon; that categorization comes with the assumption that making sense is not a primary goal ...

The result is a creation of unpredictable environment for players, who are kept guessing at every closed door, and laughing around the play table, even as their characters suffer increasingly improbable demises."

In this respect, Horvath called Tegel Manor a pioneer of the mega-dungeon both in print and in videogames such as Zork, Metroid and Bloodborne, saying, "Tegel Manor isn't quite so arduous or lengthy, but it helped paved the way for all of those other terrifying holes in the ground.