Here at PartyCasino s software is entirely browser based and was created in house by Bwin. Bonus Dollars awarded are valid only on PartyCasino Slots. . Negative reviews on AskGamblers: Users complain some bonuses come with huge wagering requirements; Added features are not very varied beyond the slot game. bwin. Live Betting Site, Welcome Bonus, Live Features, Rating, Secure Link, T&C's. Below, we have listed the best live sports betting sites you can check.