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J.A.C.K. (commonly Jack) is a map editor for games with a Quake-style BSP architecture. Jack is heavily based on Hammer, improving upon the experience from Hammer 3.5 by adding many quality of life features inspired by those found in Hammer 4.x, Q3Radiant, and more. supporting Half-Life, Quake, Quake II, and Quake III, along with many other games and mods running on their engines, such as Gunman Chronicles,  Hexen II, and  Tremulous.

Jack is available for free on its website. A paid version, with several bugfixes and some extra features, is also available on Steam.

Important:The map compilers which come with Jack are forked from older versions of the various engines' compile tools and are not actively maintained. Additionally, the paid version of Jack does not include compile tools for GoldSrc due to license conflicts.

As Jack exclusively uses Valve220 notation for exported MAP files (being the first editor to extend it for use with Quake II and Quake III), a supported compiler is required. The following up-to-date

• GoldSrc - VHLT 3.4 and forks
  • Sven Co-op - SCHLT
• Quake (and  Hexen II) - ericw-tools
• Quake II - see MAP (file format)#Quake II
• id Tech 3 - the version of Q3MAP2 included with NetRadiant-Custom

Features

See here.

External links

• Home page
• Website
• Download page
• Steam page