Where a supplier's responsibility starts and stops

Responsible gaming.

We build the games; we do not run them. That line decides which promises we are actually in a position to keep — so this page names those, and declines to borrow the ones that belong to somebody else.

Stackwell Solutions is a B2B supplier. We do not open player accounts, take bets, hold player funds, or decide who is allowed to play. Those belong to the licensed operator whose lobby a game appears in — and so do the tools that matter most to a player in trouble: deposit and loss limits, reality checks, time-outs and self-exclusion. If you play one of our games somewhere, that operator's tools are the ones that can act, and that operator's licence is what obliges it to offer them.

Nothing on this site is a real-money product. 18+ · Demos on this site use play money. No real-money play happens here. The demos exist so an operator can evaluate a game, and they cannot pay out.

A supplier's honest contribution is the machine itself. These are the parts we can evidence.

  • The number is published. Every game sheet on this site carries its Target RTP — labelled a target, because that is what it is: the long-run figure the machine is built to, not a forecast of your session. Volatility and max win sit next to it. All of it is read from the live game configuration rather than typed in by hand.
  • The number is measured, not asserted. Every published game is re-simulated on every code push — 200,000 spins per game in CI. Before a game can be switched on for an operator, its server-measured RTP must land within ±1.5 percentage points of its declared target, and live audits re-measure at 300,000 spins against the production database. We have caught our own tuner overstating a game's RTP. That is precisely why the gate exists.
  • Never above 100%. A game that overpays costs an operator money; one that underpays is a fairness problem. Both block a release rather than file a ticket.
  • The server decides. Outcomes are computed by the server engine, never by the browser. A mechanic that exists only client-side does not ship on a real-money game — the animation is a report of a result, never the thing that produced it.

The whole of it is on the method →

You will not find a certification badge on this site. No third-party laboratory has tested our maths yet, and when one has, this page will name the laboratory and the report — because a badge that nobody can look up is decoration, not evidence. Until then what we offer is the gates above, and the willingness to walk an evaluator through them.

The organisations below are independent bodies, not partners, sponsors or certifiers of ours. We list them because they help people, not because they endorse us.

Free, confidential, and nothing to do with us:

  • BeGambleAware — free, confidential advice and treatment support.
  • Gambling Therapy — free support in a range of languages, wherever you are.

If you play at a licensed operator, it is also required to give you limits, time-outs and self-exclusion. Using them is not losing.

The same argument, from the engineering side: how a game is measured before anyone is asked to trust it.