
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.
Modeled estimate, not a reported figure. How we estimate →
Media

About
Step into a bullethell adventure!
The world of Grumpy Jack is brought to life in rich, detailed 2D animation, filled with strange creatures, forgotten corners, and unexpected charm. Every area feels unique, with something new to learn or stumble into around each bend.
You’ll meet quirky characters, unlock a wide range of skills, and piece together a story full of dry humor and odd surprises. Whether you're solving a puzzle, dodging a trap, or helping a skeleton with a strange request, there's always something weird and worth chasing.
If you like classic top-down gameplay, oddball adventures, and a world that doesn’t take itself too seriously, Grumpy Jack is ready to welcome you in.
Explore a large, interconnected world with Metroidvania-style progression
Top-down bullethell action
Learn and master a wide variety of skills
A humorous story full of odd surprises and bizarre characters
Five difficulty modes, from relaxed to relentless
Hand-drawn 2D art and animation in a unique Halloween-inspired setting
Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English
Engagement
Hours played at review time, across 20 reviews with recorded playtime.
Reviews
Played on OG LCD Steam Deck without issues. Fantastic extremely underpriced game! Dans of minishoot adventures will love this is well as Metroidvania fans, buy it without hesitation and maybe gift it to someone. Also check out Super Robiy! Never mind my playtime, my internet went out and I played offline a bunch.
Цікава і потішна іграшка.
I really enjoyed the game. It's a short one, but keeps you entertained for 2-3 hours. I would love to see developer taking on a larger project in similar fashion, because only thing that i could nag about was the length of the game - and cheap price also justifies the length. Still, I was left craving for more because it was so good :)
A solid short experience. For the price, I don't regret it. I wish the dev cooked a bit longer as the game had a lot of potential to be great. I give the game a rating of: Good (6.4/10)
What a thoroughly pleasing little experience! I don't use "little" to diminish the work or impact or quality here, this game was crisp to control, pleasing to explore, had just the right amount of difficulty to make me thoughtful about strategy and execution, and the "sarcastic spooky" theme was a charming throwback to late 90s/early 00s vibes. This felt like a game that would have totally slammed on Xbox Live Arcade, and I mean that as an absolute compliment.
This is a great game! So much fun to play. It has adjustable difficulty so you can play based on how easy or hard you want. I like the overall gameplay. It’s simple enough that it makes for a nice game to play when you want to unwind after a long day at work. Ver good stress reliever of a game. I love this game!!! This plays great on a Steam Deck or an Odin 3.
<3
Nice little Metroidvania with rewarding exploration.
It took me just under 3 hours to complete (for 96% completion). Given the price I have no issue with the length. After a few particularly challenging games, I needed a palate cleanser and this was the perfect one. There is no platforming but the combat is fun with rewarding exploration and a steady stream of unlocks, new abilities, and power increases. There is funny dialogue and it feels fresh. It was very chill, save for a difficulty spike at the final boss that compelled me to go back and get a few more unlocks.
A perfectly silly and comfy zelda like. Size long enough to play in one sitting. Recommended!
Related
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Trends
Modeled estimate over time, reconstructed from Steam's monthly review histogram.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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