Game Info
Release Date May 28, 2026
Developer 3oaks
Supreme Diamond XXL in pictures

Supreme Diamond XXL by 3 Oaks Gaming is a 3x5, 15-line slot with classic-style reels and a diamond theme. The game uses a Hold & Win bonus system, with a Collect symbol that absorbs the values of visible Bonus symbols. A 777 Wild also appears in the main game, substituting for regular symbols but not for Bonus, Collect or Jackpot icons.

The bonus round is triggered through a combination of Bonus and Collect symbols, by Lucky Spin, or via the Diamond Metre. In the Hold & Win bonus game, up to five Collect symbols can land on reel two and stay locked while the round continues. New Bonus symbols may appear during the feature, including fixed MINI, MINOR, MAJOR and GRAND jackpots. A Super Bonus Game is also available, starting with at least three Collect symbols.

This demo version lets players play for free and practice before playing for real money. The review page near the launcher gives a short overview of the slot’s mechanics, including the collection feature, jackpot values and the bonus shop option for direct access to bonus rounds.

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