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July 1, 2026

Duke Nukem II - Co-op Mod - v0.9.0

Download link: https://github.com/FluffyQuack/RigelEngine/releases

Here's a mod/fork I made of Rigel Engine -- using the fan-made Duke Nukem II re-implementation as base.

Instructions:

  • Extract files anywhere.

  • Copy Duke Nukem II files to same location.

  • Run RigelEngine.exe

My version has the following features:

  • Co-op support for up to 4 players. You are prompted to add new players when starting a new game or loading a game.

  • If you go into Options, you can find a few new settings, like:

  • Friendly fire toggle.

  • Colour settings for each player.

  • Note, I haven't done a full playthrough yet, so I don't know if there are any major issues remaining to fix.