Announcement
Grumpy Jack just released!
Heck yeah! Thanks everyone involved for your support. Have fun!
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Grumpy Jack
Also known as Grumpy Jack, gj, grumpy jack
A bullethell adventure awaits! Join Jack, a reluctant hero, as he battles bizarre enemies, uncovers secrets, meets quirky characters—and hunts down Death’s missing coffee mug.
Last update
25 Jun 2026
Latest update
Update history
Browse past updates and patch notes for this game.
4 updates
December 2025
- The demo is offline, but will be available during festivals.Hello everyone! The demo will be taken offline and will be re-activated during special events like Next Fest. Vince
November 2025
- The new demo is live!Hello everyone! I wanted to share that the demo for my game Grumpy Jack is live. It's bigger, has lots more content, and very much improved. It would mean a lot to me if you check it out on the Steam page and give it a…
June 2025
- Important demo update!Hey everyone! Thanks so much for all the feedback for the demo—it’s been super helpful! Based on your input, I’ve made some exciting updates to shake up the combat and bring a bit more flair and challenge to the game. �…
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