What is SlabRoll? Cards, cash, and a game for collectors

Made for the grail hunters.

A grail is personal. It might be the card you have wanted for years, a piece that completes a collection, or something you never expected to find. That feeling is part of the reason collectible games belong in the StackRoll story.

SlabRoll is the game we’re building around cards and cash rewards. StackRoll is the wider platform; SlabRoll is one of its original game concepts. Keeping that distinction clear matters while we introduce both names.

Our wider collectible plans start with PSA-graded trading cards. The specific SlabRoll reward lineup has not been announced, so this introduction is not a list of cards you can currently win.

Cards or cash: the concept so far.

The confirmed idea is simple: players can win a card or cash through SlabRoll. The detailed rules are still to come. That includes how rewards are assigned, whether a player has any choice between reward types, and what happens after a result.

We have not announced that every play wins a prize, or that a card can always be exchanged for a particular cash value. Those are different product decisions, and they need clear rules before anyone plays.

For collectors, details such as the exact card, its grade, and how it reaches you matter as much as the reveal. We want the eventual explanation to answer those practical questions alongside the game mechanics.

Where provably fair fits.

SlabRoll is being developed as a provably fair game. At a high level, that means a player should be able to check the game’s outcome against its published verification method. Our guide to provably fair games explains the idea and the limits of that claim.

The SlabRoll algorithm and verifier have not been published here. When the game is ready to be explained in detail, the rules, inputs, reward mapping, and verification steps will need to describe the actual implementation. This preview does not establish a finished fairness system or an independent audit.

What is still to be revealed?

• The full rules, odds, and reward structure.
• The available cards and the terms for cash rewards.
• The verification method and how to check a result.
• Eligibility, availability, and fulfilment details.

SlabRoll is not playable on this landing page yet. If you want a little airtime while we build, Flap Off is available for free play, with demo multipliers and no prizes.