As already mentioned, there are slot machines that offer a demo mode in which any user can test their skills. Please note that both registered and non-registered users of the casino can participate in the demo mode, as it doesn’t require any registration. Also, note that the slot machines that offer this demo mode usually offer a limited series of game options since, in the end, the objective is that new users can try the features of the new slot games. The main advantage of playing free online slot games is that you don’t need to place any real money bets to enjoy the game, so there is no risk of losing your money either. But besides this, you won’t need to register either and you can try as many different games as demos are available.