Smokin' Guns is a first-person shooter video game. Smokin' Guns is intended to be a semi-realistic simulation of the American Old West's atmosphere. Gameplay as well as locations are inspired by Western movies, particularly those from the Spaghetti Western genre. Smokin' Guns's codebase is free and open-source software, distributed under the terms of the GNU General Public License. It is built upon ioquake3, an upgrade of the original Quake III engine. The artwork and other media are licensed under a proprietary non free license.