Operation Wolf (Operation Thunderbolt) was a shooter arcade game released by Taito in 1987. The player assumed the role of a Special Forces soldier who had to rescue hostages from a concentration camp. There were six total stages that were tied together by a story line: Communication Setup, a Jungle, a Village, a Powder Magazine, the Concentration Camp, and finally the Airport. The cabinet featured a mounted gun, with haptic feedback, that the player used to shoot soldiers, jeeps, helicopters, boats, and vehicles. Ammunition could be restocked by shooting ammo crates or small animals. The hostages are freed in the Concentration Camp stage, and the player must continue to protect them into the Airport stage as they board a plane. The game ended when a player completely runs out of ammo or the damage meter hits maximum.
Operation Thunderbolt (1988) was a sequel to Operation Wolf. The biggest difference between the two games was that Operation Thunderbolt allowed for two players to play simultaneously. The characters were Green Berets that had to free hostages from a hijacked plane, with the final stage being a confrontation with the head terrorist who is holding the pilot hostage.
All in all, there were two additional sequels after Operation Thunderbolt: Operation Wolf 3 (1994) and Operation Tiger (1998). There were a number of home versions for the NES, etc., and the game was later released on Taito Legends for the Xbox and PlayStation.