DOOM Retro is a classic and refined source port for Windows PC that embodies the dark and gritty, pixelated glory of the original DOOM game. Created with a unique and cohesive set of features, it aims to provide an authentic nostalgic experience while also offering something new. Developed by Brad Harding in Western Sydney, Australia, DOOM Retro is free software under the GNU General Public License. While it pays homage to the original DOOM, it is not endorsed by id Software and uses the DOOM trademark without permission. Check out the DOOM Retro Wiki for more information on this love letter to a gaming classic.
https://github.com/bradharding/doomretro