Slots at bitcoin casinos — where the catalogue comes from

A casino operator does not write slots. It signs a contract with a studio and gets access to that studio's catalogue. The same game therefore stands in twenty cashiers at once, differing at most in the dressing of the lobby. The figure “over 6,000 titles” says how many studios have been signed with, not how much of anything there is that is unique.

• The studio's name. Visible in the catalogue beside the title. It says who is answerable for the game.
• Volatility. Some studios print it inside the game itself — high means rare and larger wins, low means frequent and small ones.
• The stake range. The lower and upper limit of a bet; when clearing wagering it is this figure that decides whether a stake limit can be kept to at all.

The return percentage. The same title is sometimes delivered in several versions differing in that figure, and the version depends on the contract between operator and studio. Giving it without a laboratory report is copying somebody else's number, not checking one.

The other kinds of game

• Plinko — an in-house game with a result-checking mechanism.
• Live tables — studio broadcasts and how tables weigh in bonus wagering.
• The games chapter — three kinds side by side in one table.