Kornel Kisielewicz
@epyoncf
Professional roguelike and engine programmer. Indiepocalypse survivor. Founder of @chaosforge_org. Author of Jupiter Hell, DoomRL, DiabloRL and AliensRL!
An unexpected, but very welcome surprise from BlindiRL - wanna know more (everything?) about how Jupiter Hell Classic came to be, and what it is? Give the man a like <3 youtube.com/watch?v=oxt-LC…
Jupite... err DoomRL #devstream is live! Today's plan is new special levels, fixes and prepping 0.9.9.9 BETA 8! #doomrl twitch.tv/epyoncf
Jupiter Hell Classic, traditional roguelike and DRL expansion and total conversion, comes to Steam Early Access on August 13th! Wishlist and mark the date <3! store.steampowered.com/app/3126530/Ju…
Jupiter Hell Classic on Roguelike Radio! An hour of history, design and future plans, interview by Darren Grey! roguelikeradio.com/2025/07/roguel…
It's kinda fun to ask GPT o3 fairly simple questions and track on how much and how silly "overthinking" is done :P. #AICruelty?
Jupiter Hell Classic dev stream #37 is live! (yes, I don't post about every stream to avoid spam :P) Today - explosions, weapons and balancing! twitch.tv/epyoncf
Yes, reading Steam reviews for your own games might be sometimes frustrating, but I read each one of them, and sometimes they make my day <3

Jupiter Hell Classic #devstream #32 is live! Today - flooding some fills! #doomrl #jupiterhell twitch.tv/epyoncf
As of today, the development version of DRL/JHC is now fully playable with a gamepad :). Yes, Jupiter Hell Classic will be playable on the Deck! :D
Jupiter Hell Classic #devstream #31 is live! Today - balance work, sprite updates, possibly some refactoring! #doomrl #jupiterhell twitch.tv/epyoncf
Closing off this weeks stream marathon, Jupiter Hell Classic #devstream #30 is live! Today - finishing Io before the 0.3 test release! #doomrl #jupiterhell twitch.tv/epyoncf
Day by day, Jupiter Hell Classic #devstream #29 is live! Today - Io special levels, items and enemies! #doomrl #jupiterhell twitch.tv/epyoncf
Day by day, Jupiter Hell Classic #devstream #28 is live! I promise I'll do non-stream posts soon too :P. Today - scout masteries and Io items! #doomrl #jupiterhell twitch.tv/epyoncf
Jupiter Hell Classic #devstream #27 is live! Today - scout traits, new items, weapons and more! #doomrl #jupiterhell twitch.tv/epyoncf
And now for something completely random - I really hope Russel Crowe will lose some weight for the Highlander remake.
Jupiter Hell Classic #devstream #25 is live! Today's plan is variety - generators, weapons, events! #doomrl #jupiterhell twitch.tv/epyoncf
Jupiter Hell Classic #devstream #24 is live! Today were working Io level generation! #doomrl #jupiterhell twitch.tv/epyoncf