Another interesting tidbit is that Chryssalids, one of the toughest enemies in X-COM, was something of an accident. "You'll notice that the Chrysallid is right next to the zombie character," said Gollop (third row, far left). "John didn't really imagine them to be connected in any way, but I very quickly had this idea that a Chryssalid would infect your soldiers, and this would turn them into zombies, which would then sprout new Chryssalids, and probably created the most annoying monster in the entire game." We're not sure "annoying" is really the right word – we'd probably go with "terrifying."
During the same panel, Gollop also revealed that X-COM was briefly canceled in 1993, when publisher Microprose was acquired by Spectrum Holobyte. See a larger version of the menagerie in the gallery below.