Supreme Diamond XXL plays out on a 3x5 reel set with 15 fixed paylines. The reels feature sparkling jewels, diamonds, and traditional 777 icons that create a glamorous atmosphere. Winning combinations form across the paylines while classic-inspired symbols land to deliver base game payouts.

The main gameplay focuses on hold and win mechanics, unlocked through shimmering diamonds that trigger high-energy respins. During these features, additive symbols, cash collectors, and sticky wilds help build growing rewards across the reels with fixed jackpots available.