OpenJazz 20260301 — original engine by AJ Thomson and Carsten Teibes, menu plasma by Alireza Nejati. GPLv2 or later; COPYING and LICENSES.txt preserve original terms and authors. Bundled Scale2x by Andrea Mazzoleni is GPLv2 or later; miniz by RAD Game Tools, Valve, Rich Geldreich and Tenacious Software LLC is MIT; argparse by Yecheng Fu and stb_rect_pack by Sean Barrett are MIT. libpsmplug is based on Olivier Lapicque's public-domain Modplug rendering code. Complete original source includes all bundled library notices.
SDL 2.32.8 — SDL contributors, zlib license; complete matching original source and notices in source/. Emscripten 4.0.23 generated browser runtime/library source and license are shared with ../scummvm/source/. fflate 0.8.3 by Arjun Barrett is MIT; preferred TypeScript source plus installed readable package and MIT notice are in source/.
Leaf Arcade browser adapter/persistence/presentation, 2026, GPLv3 or later. Native platform/checkpoint overlay GPLv2 or later. All exact modified files and reproducible preparation/build scripts are in source/. The combined distributed package uses GPLv3 or later where required. Native movement, collisions, combat, difficulty, maps and media readers remain the original OpenJazz implementation; OpenJazz is a recreation with differences from original DOS Jazz behavior. This build disables networking and uses browser SDL2, virtual local files, readable observation of native frames/state and native SDL_QUIT for page Stop.
The original engine's no-op Save menu is completed with four level-start checkpoints using its existing encrypted slot reader/Load semantics. Checkpoints retain level, planet and difficulty, not position, health, score, lives or inventory. Original DOS save compatibility is unverified and is not claimed. Bonus-level checkpoint saving remains unsupported upstream behavior.
Jazz Jackrabbit 1 game files belong to their original copyright holders. They are supplied locally by the player and never hosted or uploaded here. The shareware release is not public domain or freeware; it retains Epic's original shareware agreement. OpenJazz's GPL does not license original game assets. Full game and shareware folders/ZIP/ZIP self-extractors are decoded as local bytes; no DOS executable runs. Original files can be cached separately from bounded written checkpoint/settings storage. Storage denial permits session play.
No original game data, graphics, sound, music or DOS executable is distributed in this player. The catalog cover is an original AI-generated symbolic Leaf Arcade illustration, not original game art or a gameplay screenshot. No affiliation or endorsement is implied. No hosted inference, gameplay server, mandatory account or paid service is added.