Proprietary

Some online casinos have developed proprietary software to use by online gaming sites, that can't be found at any other casino. In terms of trusted casinos like Slotland, which is one of the oldest and most trusted casinos on the net, it can be a great thing because you will find games you have never seen anything like before.

It can be a double edge sword however if you don't do your research first. You want to make sure that the casino has a good reputation and the software has been tested properly to make sure you are not throwing away your money.