DOSDOS · 1990 · Action-adventure
Heartlight
Heartlight (DOS, 1990) has a partial official source release.
Data checked 2026-10-12 · unbaked registry
Projects
Heartlight
Source release
Wikipedia: source-available (non-OSI license and/or partial SDK code); source released 2005 by/for X LanD Computer Games / Janusz Pelc. The 8-bit Atari source code became available around 2005. Other games like Robbo became available too.
What you need
You need your own copy of the game: these projects ship code only.
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GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.