Bally Casino joins Bally Bet Sportsbook in the growing portfolio of online gaming options the company offers. 18 last year as part of an ambitious .2021: With the introduction of the online Bally Casino, Bally’s expands its New Jersey presence statewide and brings its action-packed slot and table game offering online for all to enjoy. Bally's, formerly known as Twin River Worldwide Holdings, bought the Atlantic City casino on Nov.