United Kingdom Gambling Commission (UKGC).Checking the licence, security measures and fairness are essential steps. Xtremewin Licensing, Safety and Trustworthinessīefore we get any further, we start by establishing a casino’s credentials. Xtremewin is no different and we’ve applied our thorough review process to find out more about the following categories: Whether it’s a new site or an experienced online casino, we put every operation through its paces. What You’ll Learn in This Xtremewin Review Besides the casino, the site is also home to a sports betting platform. Xtremewin is run by Vivaro Limited, a company registered in Malta.