All games featured on 21.co.uk are put through rigorous tests. This is a regulatory requirement of all licensed UK gambling operators. In addition, each of the software suppliers who provide 21.co.uk with games will conduct their own extensive testing including playing through the games millions of times before any game is made available on our website.
All games on our sites use a range of highly sophisticated Random Number Generator (RNG) devices that create random outcomes for each game. Whatever the customer has bet on or the amount they have staked has no influence on the number the RNG arrives at.
The RNGs are accredited by range of independent testing companies, including Gaming Laboratories International, that complete a range of tests to ensure the RNG is completely random.
The RTP of a game can be found on the game's info page (usually a small circular logo with an 'i' in the middle.