Lithtech

LithTech is a game engine which was initially developed by Monolith Productions in collaboration with Microsoft. Monolith later formed a separate company, LithTech Inc., to deal with further advancements of the engine technology and currently, after a change of its corporate identity, LithTech Inc. is known as Touchdown Entertainment. A number of different video game developers, including Monolith itself, have used LithTech to power their first-person shooter games, establishing it as an alternative to other products, such as the Quake and Unreal engines. The LithTech engine's latest incarnation is Jupiter Extended (or Jupiter EX).