I don't think there were any vault dwellers recruitable in Fallout Tactics, though you could have ghouls, supermutants, deathclaws and robots. It's also based because you actually fight the distilled essence of techbros there, which are furthermore written to be literally current US political establishment just with advanced tech:

Vault 0 was a place where the geniuses of the pre-War United States could be kept in cryogenic stasis; their brains were extracted and frozen for the duration of their "residence" in this Vault. They were hooked up together to one big supercomputer called the Calculator, which was supposed to function in collaboration with the brains of these pre-War geniuses to design and nurture an ideal human society in the post-War U.S. by educating the survivors and residents.

Due to budget cutbacks by the Department of Defense (because of a false sense of safety as a result of the repeated drills), several important backup systems were not included in the neuro-link systems. This caused the Calculator to become corrupted and instead of releasing the robots to make the wasteland safe for humanity, the Vault 0 robots began to exterminate all life, completing the so-called "pacification protocol."

As for the geniuses plugged in, most of them suffered severe brain damage, dementia and cognitive deficits from a combination of age and prolonged radiation exposure (not mutation). Technology, it seemed, has not been affected by the ravages of nuclear radiation.