• Released (for free!) under the GNU General Public License.
• Map-editor for many games: Quake 1, Hexen 2, Quake 2, Heretic 2, Half-Life, Sin, Kingpin, Soldier of Fortune, Quake 3: Arena, Star Trek Voyager: Elite Force, Half-Life 2 and a lot more... Look here for a more complete list.
• Unique and editable tree-view display, which shows objects that the map/model consists of.
• 3D preview with software-, OpenGL- and 3Dfx(Glide)-render.
• Colored lights in OpenGL 3D preview.
• 2-, 3- and 4-view layout of map-editor.
• Textured view edit in map-editor.
• Texture-browser with textures neatly grouped into categories.
• Mirror-, Duplicator- and Hollow-maker functions for easy map-making.
• Extendable with plug-ins, coded in Python.
• Negative brushes - creates a movable hole, no more redoing your carving/brush subtraction.
• Bezier/patch editing, with helper functions to ease creation.
• Manipulate brushes, textures and entities directly in the 3D windows.
• Player-, monster- and item-models viewable in 3D preview. (Not all games)
• Unique high accuracy of brush- and texture-alignment in map-editor. (May require special build-programs)
• Mailing-lists supplied by YahooGroups, for easy communication to and from QuArK users.
• Project-explorer to keep all files of the TC/PC/MOD collected in one file.
• A fully functional model-editor (Not all model formats are supported)
• Customizable keys, mouse-buttons, colors and more.
• Extremely newbie-friendly map-editor, very different from other popular map-editors, with context help and intuitive functions.

See also the map-tutorial for a quick glance of how to work in the map-editor.

QuArK 6.x has the following system requirements:

• Intel Pentium or compatible.
• Minimum amount of RAM needed differs per game, but at least 64 MB is advised.
• About 40 MB of free disk space to install QuArK.
• Windows 95 or compatible.
• Internet Explorer 4.0 or higher.

Note: this list is not necessarily complete and may not be right. QuArK is changing with every release, and thus the exact system requirements are shifting with every release too.