Game · Action & shooters

RigelEngine

A modern re-implementation of the classic DOS game Duke Nukem II.

Completely free
Windows, macOS and Linux
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: GPL-2.0+ — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Flathub
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows, macOS and LinuxEstablished by Linux: Flathub, Unspecified source · macOS: Unspecified source · Windows: Unspecified source
Publisher: Nikolai Wuttke
Latest version: 0.9.1 (10 December 2022)
Latest activity: 11 September 2026
Source code: lethal-guitar.github.io/RigelEngine

Overview

Gameplay elements described in its Flathub listing and on its official website: controller support.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information

“On top of that, it offers various modern enhancements like higher frame rate, better game controller support, a wide-screen mode, quick saving etc.” — Flathub, 10 November 2026

At a glance

RigelEngine is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

RigelEngine is a re-implementation of the game Duke Nukem II, originally released by Apogee Software in 1993 for MS-DOS. It works as a drop-in replacement for the original executable: It reads the game's data files and plays just like the original, but runs natively on modern operating systems. On top of that, it offers various modern enhancements like higher frame rate, better game controller support, a wide-screen mode, quick saving etc. In order to run RigelEngine, the game data from the original game is required. Both the shareware version and the registered version work. You can grab the shareware version from archive.org: https://archive.org/download/msdos_DUKE2_shareware/DUKE2.zip

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Unspecified source (platforms) — 9 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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