Professional roguelike and engine programmer. Indiepocalypse survivor. Founder of @chaosforge_org. Author of Jupiter Hell, DoomRL, DiabloRL and AliensRL!

Wroclaw, Poland
Joined March 2010
Kornel Kisielewicz retweeted
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OMFG someone ripped off my (decade old) game using AI and is now selling it on Steam. They ripped the same mechanics, level design, UI, even some sprites. The store description is AI slop. The main character is a bomberman sprite??? WTF IS GOING ON @valvesoftware
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Kornel Kisielewicz retweeted
Greetings, mercenaries! Quasimorph has officially left Early Access and launched in version 1.0. For the next two weeks the game will be available at a 33% discount. Thank you to everyone who stayed with us throughout Early Access. Good hunting, mercenaries. #roguelike #turnbased
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Kornel Kisielewicz retweeted
Replying to @quasimorph
Thanks for hosting, fellow sci-fi demon hunters ;) Jupiter Hell Classic, the successor to DoomRL and sidekick of Jupiter Hell just recently had a big content patch and is also slowly crawling to 1.0! xitter.cf/epyoncf/status/2081788…
Jupiter Hell Classic 0.12 "CRI"... err, "BLEP!" is OUT! 7 new special levels! New 2-specials-per-moon layout! CRI branch & 4 new CRI enemies! Red keycards & Sector reports! Blood for the blood god! Link for cat pics and also changelog in first reply!
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Kornel Kisielewicz retweeted
We're honored to be this week's official #TurnBasedThursday host! #gamedevs #indiedev share your #turnbased games below, and use the hashtag! Like what you see? Don't forget to ❤️/🔁 and feel free to @ other devs!
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Kornel Kisielewicz retweeted
Mark this date in your calendars! Quasimorph will launch in version 1.0 on July 31, 2026! #roguelike #turnbased #gamedev
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Kornel Kisielewicz retweeted
Classic rogue-LIKE fans, this indie developer made a turn based title with permadeath, procedural levels and pure 90s sci-fi carnage, from the developer of DRL (f.k.a DoomRL) It's called Jupiter Hell Classic, and it's 20% OFF for the Steam Summer Sale!
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Kornel Kisielewicz retweeted
JUPITER HELL DOUBLE RELEASE! Jupiter Hell 1.9 "Heavy" is out, new Heavy Gunner class, new traits, perk upgrades, buffs and more! store.steampowered.com/news/… Jupiter Hell Classic 0.11 "Terminal" is out too, with the Warden boss, bots, terminals and Hacking! store.steampowered.com/news/…
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It's finally time, we're hosting #TurnBasedThursday this week❗ DEVS 👉 Share your turn-based game here! PLAYERS 👉 See all the coolest turn-based games below! 🔁 + ❤️ to reach more players, and don't forget to use the hashtag! 🐸
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Kornel Kisielewicz retweeted
Jupiter Hell Classic 0.10 "Heavy" is out! First brand new class arrives with 5 brand new Master traits and 6 new regular ones! Also in - Guardians, Archwarlocks, unique, exotic, perk and relic buffs, spool-up, and a new particle engine! Steam link in first reply!
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Kornel Kisielewicz retweeted
Replying to @GoblinzPub
Glad to have you host this special festival week! Jupiter Hell and Jupiter Hell Classic (EA) are both on sale now! One is 3d, the other pixel art, both providing the traditional turn-based roguelike experience in 90s FPS sauce! store.steampowered.com/app/8… store.steampowered.com/app/3…
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Kornel Kisielewicz retweeted
It's a big week for #TurnBasedThursday! We're honored to host today’s thread on X during the #TurnBasedThursdayFest! 🥳 #IndieDev and #GameDev folks, we're eager to see your turn-based games in the replies! 👇 ❤️/🔁 your favorites and @ others you love!
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<12 hours to go! 😀 Can't wait for you to see the Steam sale page; we put a ton of effort into curation to make it fun to discover new games. Join the Turn-Based Games Discord (🔗 in bio) too! Great spot to get recommendations, share discoveries, find people for multiplayer…
2 days until #TurnBasedThursdayFest features 450+ hand-picked games! A massive 7-day online festival & Steam sale! 🎉 The event begins with a 25 game trailer showcase - youtube.com/watch?v=PtaTVDoj… - first-time game reveals, brand new launches, release date announcements, and more.
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Kornel Kisielewicz retweeted
Replying to @GamesGhostPixel
Thanks for hosting! Jupiter Hell Classic is the "unfollowup" to Jupiter Hell and remake of DoomRL, the OG traditional roguelike turn-based shooter. We're in Early Access with a dynamic community and monthly updates! store.steampowered.com/app/3…
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Proud to host this week’s #TurnBasedThursday! on X! ⚔️ 🎨 #IndieDevs with a turn-based masterpiece? Drop it below! 🚀 Tactics fan? 💬 Comment, ❤️ Like & 🔁 RT the gems in this thread! Use the hashtag. Tag fellow travelers. Let strategies clash! One calculated turn at a time.
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Kornel Kisielewicz retweeted
“Dude I have 10 agents running while I sleep. No one is prepared for AGI in 2 years man.” “So what are you building?” “Bro all my smartest friends are vibe coding until 3am every night. It’s all about agency. Intelligence is a commodity man.” “So what are you building?” “Do you even study exponentials? Have you seen the latest METR chart? You’re going to be stuck in the permanent underclass bro.” “So what are you building?” “Did you even setup OpenClaw? I’m maxing out my token budget everyday man.” “So what are you building?” “I promise you I’m 10x more productive bro! You just don’t understand! Please bro just…. I know you use this stuff everyday too, but you must not be prompting it right! Please broo…”
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Kornel Kisielewicz retweeted
I have been testing a lot of AI app/gamedev tools lately, and frankly none of them has good enough quality to have any impact. They are focusing way too much on one-shotting to impress investors. But real game-dev is an iterative process. If your AI platform can't beat Roblox UGC games in quality, then your platform will fail. Who's going to spend time playing shit like that if there's better alternatives around? More is not better. Quality is what matters in competitive market. Better quality than Roblox games is the minimal bar. And it can't be 5% better. Nobody will notice that. Needs to be clearly better quality to lure people jump the ship.
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Kornel Kisielewicz retweeted
🌟 I’m honored to officially host this week’s #TurnBasedThursday - let’s make some noise! 👩‍💻 Devs: Share your #TurnBased game links/screenshots and use #TurnBasedThursday! 📣 Gamers: drop ❤️, RT, tag friends, and help these projects get seen! #IndieDev #GameDev
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Kornel Kisielewicz retweeted
Pure vibe coding is like a Ponzi scheme: you take on debt, then pay it off by doing more of the same thing that creates even more debt. It works for a while, until the debt compounds to the point where you can't kick it down the road anymore. Then you're fcked.
Unpopular opinion: you actually need real coding knowledge to vibe-code properly.
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Kornel Kisielewicz retweeted
Jupiter Hell Classic 0.8 "Arsenal" is out now! Item perks, ADV gear with random perks, powerful Relics, clearer UI, reworked status timing, assembly cleanup, balance tweaks, and a new difficulty curve. #traditional #roguelike store.steampowered.com/news/…
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