https://github.com/marrub--/GLOOME/
GLOOME:
GLOOME is a commercial-friendly GPL-compliant rebrand of the GZDoom 1.8.10 engine, which is based on the ZDoom engine, which in turn is based on id Software's Doom engine.
It's a little bit incestuous.
There's been a lot of discussion as of time of this writing about the viability of using Doom source ports to create full-fledged indie games. A lot of people have come out with some astounding pr