Hi, first of all, I just finished it and I love this game! Thank you for your hard work. Now, while we wait for episode 2, you knowing your game the best, can you give us any game recomendations which feel and play similarly (gzdoom or otherwise.) Thank you!.
Glad to hear you enjoyed it, I really can't think of any game that's like Hedon 100%.
When it comes to GZDoom I always recommend Ashes 2063 which is an amazing total conversion retro shooter that doesn't get enough attention.
Another one I usually recommend Inquisitor 3D, it's an RPG but in some regards it brushes up with Hedon's design and the kind of design I like - https://forum.zdoom.org/viewtopic.php?f=19&t=54380
You can also try Winter's Fury for GZDoom, that's also great, and you'll notice similarities in the soundtrack style and boss fights with Hedon.