Software designed to create and edit game levels.

software designed to create and edit 3d levels. aka map editor. while id software (and other companies using the quake engine) use the in-house QE4 (QuakeEd4) editor, many quality editors have been developed and released by the quake community. QI map editors of note include the popular worldcraft editor, the powerful BSP editor, and the discontinued but successful quest. BSP, qoole, and Radiant (an enhanced QE4) offer limited Quake II map editing support. read history of level editors, more level editing info at the Guide...

A level editor is used by level designers and artists to create levels for games. Most level editors are to complicated and user-unfriendly to release to the public but some like Quake's WorldCraft and StarCraft's map editor have allowed gamers to make their own custom map. A level designer for a FPS generally needs expertise in 3D modeling and architecture.

a big, big deal

A utility used for creating, viewing, and modifying levels.