We’ll let you know where you can find these licenses and regulations so you have peace of mind that you’re playing at a legal online casino you can trust. Licenses: All of the online casinos we’ve reviewed are licensed in their respective states and meet all regulations.Despite many players not being aware of Parx as an online casino option, they offer an alternative to the big names. Players in both Pennsylvania and New Jersey are able to enjoy playing in the Parx Casino. However, in recent years they have expanded their catalog to include an online casino. With its roots in horse racing, Parx made its name through the sports betting business. Parx Casino is the largest physical casino in Pennsylvania.