BetMGM loads as a sportsbook. Not a casino lobby, not a welcome offer splash. A full sportsbook with live odds, a parlay builder, and a bet slip on the right that says "Your bet slip is empty." If you came for slots, this first screen is not for you. You have to click into Casino from the top nav to find anything resembling an online casino experience.
Top nav runs Sports, Casino, Poker, Arcade, Rewards. Arcade in there alongside Poker caught my attention. I've reviewed dozens of US-licensed operators and none of the others surface Arcade as a primary nav category. It implies a casual games layer sitting between traditional casino and sportsbook. Something lighter than blackjack, less commitment than a poker tournament. Whether the Arcade section actually has enough content to justify a nav slot I can't say from the outside, but the fact that it's there says BetMGM is thinking about holding players between sessions.
Right sidebar in the sports view carries a Mini Games section with Bingo and Blackjack tiles. Casino content sitting inside the sportsbook sidebar while you're checking odds. You don't have to leave the sports page to find something to play. That's a small thing but it's deliberate retention design.