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Orl has released two older maps of his:
Laboratory X (not to be confused with his earlier release of the same name), a huge underground base with strange comic-style custom textures; and Neighboring Alcazar's, a medium-sized orange medieval fortress complex set in a canyon, which is very reminiscent of Conflagrant Rodent.
The maps are "unmentionable" insofar as they, oms24 in particular, suffer from a lack of polish, ugly textures and awkward design decisions in places, but they may still provide a bit of enjoyment to some players.
Thanks for posting!