About This Demo

Seal the Gate Before the Final Doom arrives.

The scholars of Miskatonic University opened a gate between worlds — and something answered.

We thought it was a blessing. However it was wrong. Now their army march across every city on earth, and the Doom Counter climbs. But inside the gates, we found hope: heroes who heard our call and chose to fight. Pair two, build a deck, and roll into the dungeon. Seal the gate — or the world ends.

Build your own deck

Choose two heroes from a roster that each bend the rules a different way. Every pairing rewrites your charge economy, summon tempo, and payoff routes. Twenty cards. One machine. Tuned to explode.

Roll through a dungeon board

Each world gate is a tactical board. Dice movement drops you on battles, treasure, shops, rest,  elites, and the boss. A run is a chain of board decisions long before the final raid — press your luck, route around an elite, or bank charge for what's waiting at the end.

Hold back the Doom

The world map tracks gates collapsing and raging across major cities. Every loss pushes the Doom Counter toward ten; every first purge drags it back. Let Doom reach ten and the gates close for good.

Solve the Mythos

These bosses aren't damage races. Nyarlathotep, Ithaqua, Hastur and others arrive wrapped in immunity puzzles — find the strategy they're hiding behind, then build the one line that breaks it.

Every hero breaks the rules differently

• Carter — Pays life for burst damage

• Queen — Bypasses defenses and strikes like an assassin

• Neo — Raises the charge ceiling and shows the real power

• Blue — Collect the Mecha parts and summon the Blue Kaiser!

• Lumie — Fortifies your slots and shows the power of friendship

Combat at a glance

• Shared hero HP pool per side

• 2 hero slots, 5 minion slots, 5 spell / trap / miracle slots

• Lv1 summons are free; Lv2 once per turn; higher levels need tributes

• Charge rises each turn and powers hero skills and special cards

• Taunt, stealth, pierce, ranged, blink, traps, and persistent field effects

• Enhance Normal card to forge an Epic tier card!

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The developers of Sealbound: Cthulhu Rising used generative AI tools during development to help create some of the game's visual assets — including card illustrations, environment and boss artwork, and promotional images. All AI-assisted content was directed, reviewed, and edited by the developer to match the game's art direction. The game does not generate any content in real time during gameplay; all assets are fixed and produced ahead of release.