21 is a British platform for anyone who wants to play a wide variety of casino games online. There is no download required, and you can even get some money for free when you register an account. The website hosts all sorts of casino games that belong to some of the most influential providers in the gambling industry. As a registered user, you can also access a page created solely for promotional offers and bonuses that you can take advantage of many times. Overall, the casino uses a minimalist design with an attractive black and blue theme that helps players to concentrate on their games.