Nigel and Sebastian are the carnival freak boss of the "Carny" level of The House of the Dead: Overkill. Nigel is a dim-witted giant roughly three times the size of the average human whilest Sebastian is a well-versed, tumor-like growth protruding from Nigel's stomach. Nigel is apparently dependant on Sebastian for survival, and will protect his conjoined twin above all else. However Sebastian, despite being a parasitic twin, is fully capable (if crippled and unable to move himself) of surviving without Nigel.