J.A.C.K.

Name: J.A.C.K.
Price: 14.99 USD

Windows · Mac · Linux

Freedom report

Two barsScore 5.5

J.A.C.K. is ranked #11 of 27 in game level editors on Freedom251. It runs on Linux, macOS, Windows.

J.A.C.K. plans and pricing

Steam version $14.99 once Purchase on Steam · access to beta updates jack.hlfx.ru · 2 Oct 2026

Purpose: J.A.C.K. is a level editor for games using Quake-style BSP architecture.
Intended users: The editor aims to serve people designing levels for classic games and mods, including Quake and Half-Life.
Supported games: The editor supports Quake, Half-Life, Quake II, Quake III, and Hexen II.
Map formats: It can import and export VMF maps, though VMF support is beta and does not include Displacements.
Extensibility: Plugins can add capabilities such as brush primitives, texture and model formats, and game configurations with import and export formats.
Editing tools: Features include curved surfaces, triangulation, UV-Lock, multiple VisGroups, and automatic selection in 3D views.
Map size: The editor supports levels up to 262144 × 262144 units.
Autosave: Users can configure autosave to protect projects from editor crashes or design errors.
Distribution: J.A.C.K. is donationware distributed freely, and the donation amount is up to the user.
Support: Users can submit error reports and feature requests through the project forums; the software is provided without warranty.
Downloads: The official download page lists Windows and 32-bit and 64-bit Linux packages.
Development: The maker says J.A.C.K. has been in development since August 2013.

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