The comic-noir blackjack roguelike is now live in Steam’s Deckbuilder Fest with a playable demo full of supernatural mystery, brutal combat, and strategic cheating.
Indie developer Cosmic Cog LLC and publisher Zemore Indie Games are reminding players that Stabjack, the upcoming comic-noir roguelike blackjack deckbuilder, is officially participating in Steam’s Deckbuilder Fest until May 11th. Players can jump into the playable demo now on Steam as part of the week-long celebration of card battlers, deckbuilders, and strategy games.

Blending blackjack-inspired mechanics with roguelike progression and first-person knife combat, Stabjack challenges players to survive by bending the rules, manipulating the deck, and taking dangerous risks at every turn.
There are new features in the Stabjack demo specially for Deckbuilder Fest, such as new enemies and mechanics, new items and builds, brand new specifically crafted music unique to Stabjack, better overall UI and appearance, and events can trigger on demand!
What is Stabjack?

In Stabjack, players step into the role of Jack, a man investigating the violent death of his wife while wielding a mysterious sentient knife that speaks in her voice. As players descend deeper into a world of demons, corruption, and hidden truths, each encounter becomes a deadly game where strategy and luck collide.
Unlike traditional deckbuilders, Stabjack transforms blackjack into a tactical combat system. Players draw cards to perform attacks, defense, and setup actions while aiming to hit 21 without busting. Along the way, players can “cheat” by storing cards, manipulating outcomes, and creating powerful combinations through deck upgrades, modifiers, and supernatural abilities.
Players Can Experience During Deckbuilder Fest:
- A unique fusion of blackjack mechanics and roguelike deckbuilding
- Fast-paced first-person knife combat with cinematic style
- Strategic “cheating” systems that reward clever risk-taking
- Mystery-driven storytelling and supernatural investigations
- Comic book inspired noir visuals packed with atmosphere
- A playable Steam demo available now through the festival

Designed for fans of innovative deckbuilders and dark narrative experiences, Stabjack delivers a stylish and high-risk spin on the genre where every draw could mean survival or disaster.
Steam Deckbuilder Fest runs now through May 11th, and players can wishlist Stabjack and play the demo today via Steam.
For more information, visit the Official Steam page.
To stay updated on development news and future updates, you can find Stabjack and Cosmic Cog LLC on Twitter/X, Bluesky, Facebook, and Instagram.
Other Deckbuilder Game News: Into the Grid’s huge metaprogression update has arrived, celebrating Steam’s deckbuilder fest.












