Case study

openh4: reimplementing the Heroes of Might and Magic IV engine

openh4 reimplements the Heroes of Might and Magic IV engine in C++23 using data from a player's own GOG copy. The repository contains the engine, a game application and h4-tool for inspecting and rendering game data. The author describes the project as unfinished.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 10
Last commit: 2026-10-12
Language: C++
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: An original Heroes of Might and Magic IV copy from GOG is required.
Prerequisites: Building requires CMake 3.28 or newer, Ninja, a C++23 compiler, zlib and liblzma; SDL3 is required for the game application.
Limits: The project is unfinished.
License: GNU General Public License version 3.

Cite

BibTeX

@misc{openh4-case,
  title = {{openh4: reimplementing the Heroes of Might and Magic IV engine}},
  howpublished = {\url{https://github.com/tallowmere/free-heroes4}},
  url = {https://github.com/tallowmere/free-heroes4},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/openh4-case/}}
}

Plain text

openh4: reimplementing the Heroes of Might and Magic IV engine. https://github.com/tallowmere/free-heroes4 (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/openh4-case/

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Primary sources

README GitHub · tallowmere/free-heroes4 · Revision 57d72e8
LICENSE GitHub · tallowmere/free-heroes4 · Revision 57d72e8