Just to inject a few facts about Gor arising out of the last few posts since my last:
Most Goreans would be considered fighters in the D&D system. Torvaldslanders (Gor’s Vikings) are closer to barbarians, and go berserk pretty much in the classical fashion. The Wagon Peoples of the southern plains are similar to the Golden Horde (with the emphasis on the horde!) - nomadic mounted archers and lancers. They ride the kaiila, which is mostly cat with a dash of camel thrown in; horses are unknown on Gor. Similarly, the desert tribesmen are kaiila cavalry, almost exclusively using the scimitar. The eastern Barrens are home to the “Red Savages” (Gor is not long on political correctness) who are very similar to horse Indians, with the exception of the Winyanpi tribe who have successfully trained the tarn.
Civilized Goreans most closely resemble Classic-age Earth and have the most access to what passes for technology on Gor. This is non-trivial; transport on Gor is restricted to wind and animal power, and weaponry to the primitive level noted above, but otherwise they are up to Industrial Revolution standard in some areas, and in a few very advanced. Tarl Cabot, in book 1, was introduced to a language-translator about the size of a portable typewriter - enough to help him learn Gorean. The Priest-Kings, of course, can do better.
The Caste of Assassins would be the most rogue-like of any Goreans, though it should be noted that they are still a good match for Warriors in single combat (but less drilled in battlefield tactics). There is no magic of any kind on Gor; although book 25 is called “Magicians of Gor”, there is nothing but stage magic going on in that book. Initiates may believe that they can call on the Priest-Kings for miraculous intervention, but any actual intervention is entirely discretionary. There are no recorded warrior-monk cultures on Gor; the Assassins are more monastic than most, but not to the extent of practicing bare-hand fighting as anything other than an emergency measure (and Assassins usually intend to be the emergency 
).
Sleen are widely used in all Gorean cultures as guard animals and trackers, at both of which they are superb. They are similar in size and disposition to a sabretoothed tiger, except that they have six legs, and their scent-tracking capabilities start where a bloodhound’s leave off. A well-trained specimen can follow a trail that has been cold for months.
The existence of the Priest-Kings is generally acknowledged by most Goreans, including the Red Hunters (Gor’s Inuit) though I can’t swear for the Red Savages; the Torvaldslanders worship Odin and Thor but don’t deny that the Priest-Kings exist. Their true nature is known only to a handful of men. They are intelligent giant insects who have been technologically advanced for thousands of millennia and brought Gor into Sol system at some time in the past from its original location in another galaxy, so it would be unwise to underestimate their capabilities. They are known to use surveillance technology that can at least cover the surface of the planet. It was probably damaged in the “Nest War”, an internal struggle that occurred in Priest-Kings of Gor, but there is conclusive evidence that a new generation of Priest-Kings was in existence by the time of Beasts of Gor and it is probably back in working order.
It’s unclear whether Priest-Kings ever sleep. It is certain that their brain structure is utterly unlike a human’s and it would be unwise to count on any mind-affecting spells being efficacious against them. Although they are sighted creatures, they rely more on scent, and communicate by means of scent signals. Again to stress, practically nobody on Gor knows this. It therefore follows that even if they can be scried, it’s impossible to know what they are saying to each other. It also means that invisibility is largely useless against them, especially in the familiar surroundings of the Nest.
They are known (that is, the books credit them with this) to use “silver tube” ray-guns, the “Flame Death” as a means of remote execution, interplanetary spaceships which are also capable of flight over the planet’s surface, and an “Ur disruptor” which is described as a “gravitational disruptor” but disintegrates matter in a manner that can’t be attributed to gravitational interference. (Since its function was explained to Tarl Cabot by a Priest-King using a translator, there may not have been words in Gorean for what it actually did. Think of it more like an “intrinsic field subtractor”, which is generally bad news unless your name is Osterman.) Its effect can be summed up as “You point it at something, and the something becomes monatomic dust” and if I were a drow I wouldn’t want to risk it. I’m not dead sure that even Lolth is immune.
They certainly have the capability to put missiles into orbit and plaster anywhere they like with ordnance. They destroyed Tarl Cabot’s adopted home, the city of Ko-ro-ba, between the events of the first two books, and could doubtless do likewise to any area of Gor they chose, which would probably spell bad news for any monstrous horde roaming the surface of the planet. There is some kind of scrambler field surrounding their mountain home, the Sardar, which repels animals. They can implant a mind-control web into the brain of a human and subsequently see and hear through his eyes and ears. (They can also burn his brain out if he somehow throws off the mind control itself.)
However, they have no particular objection to Gor being shared by non-humans, as long as these uphold their laws concerning weapons and technology - which was why my first mention of them in the “Crossover” thread had them Flame Death-ing a drow for tossing fireballs around. As I’ve said, they would not necessarily take direct action against the intruders, and might respond merely by relaxing some restrictions for the duration of the emergency. But unkillable monsters roaming Gor probably would draw some direct action. Consider them Gor’s “Gods of Game Balance”.
It struck me yesterday that there is an answer to most creatures that are immune to normal weapons (not demons, unfortunately. We’re going to need to work on that). The slave-goad featured in Assassin of Gor, though primarily intended as a disciplinary device, can be set to deliver a killing shock; and it would not be too hard for the Caste of Builders to adapt this to a monster-killing weapon. That balances things up against anything that takes damage from electricity, at least.
Of course, the trouble with demons is that wherever they go, ghouls are never very far away [spoiler]because demons are a ghoul’s best friend*.
