The Outfoxies (アウトフォクシーズ) is a 1994 arcade game by Namco that depicted several professional hitmen secretly set against each other by a held-in-common client "Mr. Acme". Acme and his wife had hired each of them to assassinate a wealthy art collector, then arranged for them to kill each other to ultimately avoid having to pay their fee.
The game is like a cross between shoot 'em up and a typical fighting game. It featured stages that zoom in and out depending on how close the two combatants are much like Art of Fighting and Samurai Shodown, but on a much larger scale given the immense size of some of the levels.
Source: Wikipedia, "Outfoxies", available under the CC-BY-SA License.