In the Vampire: The Masquerade role-playing game from White Wolf Game Studios, Fortitude is the vampiric discipline of supernatural resilience. It allows vampires to "soak" far more damage than any human would even survive, and to do so without penalty. The ultimate application of this power (as wielded by the Ravnos Antediluvian) once allowed a vampire to survive while standing at Ground Zero of a nuclear strike. Of course, only an almost godlike vampire could survive such a thing -- most vampires will go down eventually.