Sphinx
Sphinx (Atari 7800, 1987) has an official source code release, videogamepreservation/sphinx-7800.
Projects
sphinx-7800archived
Source release8 starspushed 2015-06-26no license
Sphinx/Nile Flyer/Desert Falcon (1987) by Atari Corporation for the Atari 7800
repo archived; 6502 source: ORIGINAL
What you need
Check each project for what game data it needs. Code here is linked, never game files.
More on Atari 7800
Found via realdmx/retrore
GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.