free-heroes4 (openh4)

Category: Games & game engines · Type: Reconstruction

Target: Heroes of Might and Magic IV · C++23 / SDL3

An unfinished Heroes of Might and Magic IV engine reimplementation, with the openh4 app and h4-tool for inspecting and rendering the user's game data.

An unfinished Heroes of Might and Magic IV engine reimplementation, with the openh4 app and h4-tool for inspecting and rendering the user's game data. The README explicitly describes an engine reimplementation, separates engine code from original GOG data and marks the project unfinished. Source contains engine modules and an app; the reviewed passive AI controller only ends its turn. Needs a legally obtained GOG copy; optional acquisition signs in to GOG. The passive AI stub and brief README do not establish campaign playability or engine parity. We have not built it, signed in to GOG or played it.

Relationship
Independent reimplementation

Evidence scope
The README explicitly describes an engine reimplementation, separates engine code from original GOG data and marks the project unfinished. Source contains engine modules and an app; the reviewed passive AI controller only ends its turn.

Know before you try
Needs a legally obtained GOG copy; optional acquisition signs in to GOG. The passive AI stub and brief README do not establish campaign playability or engine parity. We have not built it, signed in to GOG or played it.

Status
Unfinished engine and tools

License
GPL-3.0 (code)
No game data is included. Original game assets and third-party dependencies retain their own terms; the engine license does not grant rights to the commercial game.

Source checked
2026-10-13

Primary evidence Passive AI implementation limit