- Planet of Evil – the anti-matter monster here is an apparently unique entity and, in any case, is more a sort of mobile hazard than something with creature statistics
- Pyramids of Mars – although we only encounter one Osiran, they are a race… however, they’re sufficiently powerful that they are more effectively described as one-off NPCs. I’m also going to pass on their servitor robots for the time being as there isn’t much to say about them other than them being large, strong, robots.
This brings us to The Android Invasion. The alien race here are the Kraals, which have leathery skin, sculpted skulls, and a small nose-horn. Other than their physical appearance, however, there seems little to set them apart from humans, and in game terms they (as with races such as the Draconians) probably don’t need any particular rules. Their titular android creations, however, are a different matter.