Sacred Line is a first person dark adventure / surreal thriller developed by Sasha Darko (a Russian music producer, game developer and writer), released for free in 2013 for PC. In 2015 an extended version of the original Sacred Line game was released for Mega Drive (phisically and digitaly), titled “Sacred Line Genesis“.
A prequel titled “Sacred Line Zero” was also in development for Mega Drive / Genesis, but in the end the project was canceled. In 2018 the Sacred Line Zero prototype was revised and released to public for free.
You can download the prototype ROM here. You can launch it via any emulator and it was tested with Fusion 3.64. It should work on real hardware via Everdrive.
Huge props to Sasha Darko for releasing the prototype!