Chaos;Head

Chaos;Head (PC, 2008) has an open-source reimplementation, FGRE/libnpengine, and 1 other public project.

Data checked 2026-10-12 · unbaked registry

Projects

ReimplementationC++, SDL65 starspushed 2019-06-04LGPL-3.0 license

Free implementation of Nitroplus/5pb. Visual Novel game engine

OSGC status: playable; development: halted; An open source implementation of the Nitroplus game engine; game already in catalog; this project is a different project type for it

Nitrosharp

ReimplementationC#, .NET, Vulkan, DirectX57 starspushed 2025-12-30MIT licenserelease 20221006.3

Open-source N2System reimplementation

OSGC status: semi-playable; development: halted; supports Chaos;Head Noah

What you need

Check each project for what game data it needs. Code here is linked, never game files.

More on PC

GameMethodYearStarsLast push

PCMindustrySource releaseAgent environment201929k2026-10-11 PCosu!Source releaseReadable bytecode+1200719k2026-10-12 PCCommand & Conquer Remastered CollectionSource release202021k2025-01-16 PCRollerCoaster Tycoon 2ReimplementationAgent environment200216k2026-10-12 PCDune 2000Reimplementation199818k2026-10-11 PCAge of Empires IIReimplementation199914k2026-10-03 PCCataclysm: Dark Days AheadSource release201313k2026-10-12 PCCivilization VSource releaseReimplementation201011k2026-10-12

Found via opengaming/osgameclones/blob/master/games/l.yaml, en.wikipedia.org/wiki/List_of_game_engine_recrea, opengaming/osgameclones/blob/master/games/n.yaml

GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.