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@github-actions github-actions released this 19 Oct 19:54
nightly
f01a225
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Nightly build of f01a225, 2026-11-02 16:13 UTC: the latest master, replaced by every change merged into it once the builds pass. It has had no testing beyond that, so expect the occasional new bug; the tagged releases are the tested ones. Please say in a bug report that you are on a nightly, and which commit.

Download

File What it is
cjacksrc-nightly-f01a225.tar.gz This is what you want: Contract J.A.C.K. (1.1) built from source, the modern build.
cjacksrc-debug-nightly-f01a225.tar.gz The same build with debug information. For bug reporting.

Work in progress. The reconstruction is not finished: see where it stands before expecting a game that plays from start to end.

No game data is included. A platform specific installer is included that copies the game's data from your own images of the two discs of the European or the USA release, and from the English 1.1 update, contractjack_update_en_10_11.exe (read, not run).

Supported images, as redump names them (a plain .iso, redump's .bin/.cue, or redump's .zip):

  • Europe: Contract J.A.C.K. (Europe) (Disc 1), Contract J.A.C.K. (Europe) (Disc 2)
  • USA: Contract J.A.C.K. (USA) (Disc 1), Contract J.A.C.K. (USA) (Disc 2)

Install

This is the whole game, not a patch. Unpack it into a new, empty directory, not over an earlier release or another installation. Copy your old Save and Profiles folders across to keep your saved games and profiles.

Windows

Unpack the archive, drop both disc images and contractjack_update_en_10_11.exe onto windows-install.bat, then start ContractJack.exe.

Linux

There's no native Linux build; the game is a Windows program, run under Wine or Proton.

tar xzf cjacksrc-nightly-f01a225.tar.gz
cd cjacksrc-nightly-f01a225
./linux-install.sh /path/to/disc1.zip /path/to/disc2.zip /path/to/contractjack_update_en_10_11.exe
./linux-run.sh

./linux-run.sh --help lists its options (a Wine prefix of its own, ~/.wine-cjack; a window or full screen); ./linux-server.sh runs a dedicated server, headless under xvfb-run when there is no display.

No codec or winetricks step is needed: the game decodes the characters' speech (MP3) itself, and plays the intro movies with its own Bink player.

Mac

The game runs in CrossOver (or another Wine for macOS). Unpack the archive, put both disc images and contractjack_update_en_10_11.exe in its folder and double-click mac-install.command, then run ContractJack.exe in a CrossOver bottle with Run Command. If macOS will not open the script (it is downloaded and not signed), allow it in System Settings > Privacy & Security ("Open Anyway"), or run it in Terminal: ./mac-install.command disc1.zip disc2.zip contractjack_update_en_10_11.exe.

What the modern build changes

Every change from the retail game, and what is planned, is in MODERN.md; the retail game's own bugs it fixes are in RETAIL_BUGS.md. Its binkw32.dll is our Bink player statically linked with FFmpeg (LGPL-2.1-or-later), and its SndDrv.dll carries minimp3 (CC0); what is whose, and where the source is, is in LICENSE_NOTES.md.

Testing

The game is a 32-bit Windows program. It is tested on Linux with Wine; Windows and the Mac have had less testing (the Mac installer has been run on Linux, not yet on a Mac). Please report problems in the issues.

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