Case study

OpenNitemare3D: reimplementing Nitemare 3D in C#

OpenNitemare3D is a C# reimplementation of the 1994 first-person game Nitemare 3D. It loads original bitmaps and maps, plays MIDI, and plays sound effects from the Windows version. The README says the active development branch is C-Rewrite.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07
Evidence class: C1 partial scope or analysis entry

Stars: 52
Last commit: 2021-12-08
Language: C#
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

Demo available · no screenshot

Observed: Code, documentation, download and demo observed; a full-reconstruction candidate for manual Class 0 review.
Scope: Partial
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

The documented C# build uses the .NET SDK and SFML. Place the Windows SND.DAT, plus UIF.DAT, MAP.1, IMG.1, and GAME.PAL, in bin/Debug/net5.0/data.
Most menu options crash. New game and the sound editor are the options that do something.
The README names no license.

Cite

BibTeX

@misc{opennitemare3d,
  title = {{OpenNitemare3D: reimplementing Nitemare 3D in C\#}},
  howpublished = {\url{https://github.com/BBQGiraffe/OpenNitemare3D}},
  url = {https://github.com/BBQGiraffe/OpenNitemare3D},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/opennitemare3d/}}
}

Plain text

OpenNitemare3D: reimplementing Nitemare 3D in C#. https://github.com/BBQGiraffe/OpenNitemare3D (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/opennitemare3d/

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Primary sources

README.MD GitHub · BBQGiraffe/OpenNitemare3D · Revision 178dcf4