Operation Killer happened in 1951-03.
Killer Gorilla happened in 1983.
Crypt Killer happened in 1995.
Killer Instinct happened in 1994.
Vampire Killer happened in 1986.
Killer Loop happened in 1999.
Corpse Killer happened in 1994.
Killer Kong happened in 1983.
a guy named steve
Golden Gate Killer happened in 1995.
Operation Sabotage happened in 1982.
Operation Gericht happened in 1916.
Operation Tombola happened in 1945.