House of 21 is a roguelike deckbuilder where blackjack is your weapon. You're trapped in a casino purgatory between life and death. Build your deck, push your luck and take on the House. How combat works: Draw cards one at a time, each one raises your total Stand at any time to lock in your hand Hit 21 and deal double…
House of 21 is a roguelike deckbuilder where blackjack is your weapon.
You're trapped in a casino purgatory between life and death. Build your deck, push your luck and take on the House.
How combat works:
Draw cards one at a time, each one raises your total
Stand at any time to lock in your hand
Hit 21 and deal double damage
Go over and bust. Your cards are halved and your hand shrinks
After standing, drag each card onto an enemy to attack or onto yourself to block
Every card in your hand is both a weapon and a shield. You decide how to spend it
The closer you push to 21, the stronger your hand. But one card too many and the turn collapses.
Cards & Badges
Badges are permanent modifiers attached to individual cards
Each card can carry up to 2 badges at once
Badges trigger on specific moments: when you draw, stand, hit 21, bust, attack, or defend
Stack two badges on the same card to create powerful combos
Build around synergies. A card with Venom and Cleave weakens every enemy it hits
Your deck starts simple. By the end of a run, every card should be doing something.
Relics
Enemies
Enemies telegraph their next move. Some have dynamic intents that adapt to your stand total or if you bust
40+ enemies to battle. Casino objects brought to life, cursed staff and more
Traits are permanent passive rules unique to each enemy: Nimble halves damage from high cards, Bulwark absorbs the first hit each turn, Spiky punishes low cards
Elites hit harder and carry rarer traits
Bosses shift through phases, summon reinforcements, and force you to adapt mid fight
Additional Features
3 playable characters, each with a unique ability and deckbuilding identity
A procedurally generated map with battles, elite fights, shops, events, and recovery bars
A shop to buy badges, relics, and new cards, or discard what you don't need
Card upgrades between battles from The Admin, The casino's mysterious host
Events with choices, risks, and rewards. 40+ events to discover
Three stages: Temptation, Greed, and Reckoning. Each with its own enemies, traits, and tone
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