Online casinos or virtual casinos as they also are known are online versions of "regular (land based)" casinos. These allow a user to play and bet on games through the Internet. Many of these casinos offer payback percentages that will be the same as that of the regular ones. Conversely, there are some that guarantee a better payback percentage than that of regular casinos, especially with casino slots. Some of these casinos also publish their payout audits on their own sites establishing their credibility. The sheer convenience of playing form anywhere makes these casinos attractive to many.

There is the issue of reliability with regards to online casinos everywhere. Most of these professional online gambling casinos purchase their software from reputed companies to establish credibility among its players and in the market. Many of these reputed software companies use random number generators to make sure that the dice roll randomly and also the numbers will also be in random.