9 Burning Dragons is a Chinese-themed online slot game with a 3x3 grid size range. Developed by Wazdan, this game comes with basic features in the base game but offers exciting bonus features and ways to win big.

Here are the main mechanics and features of 9 Burning Dragons:

- Reels: 3x3 grid
- Paylines: Wins are achieved by landing 4 to 9 matching symbols anywhere on the grid
- Symbols: Low-paying symbols include A, K, Q, J, and 10, while high-paying symbols include Chinese-style objects such as a lantern, a fan, a drum, a vase, and gold coins
- Wilds: The dragon is the wild symbol and substitutes for all regular pay symbols to help complete wins. The wild has no value of its own.
- Full Screen Wins: Land a full-screen 9 of a kind wins to receive a payout of 4 to 200 x your stake.
- Hold the Jackpot Bonus Game: Triggered by landing 3 golden dragon bonus symbols anywhere in view, the triggering symbols become sticky on a cleared grid. During the feature, you will land nothing but blanks or new sticky bonus symbols, and the respin tally resets to 3 for each new bonus symbol you land. The feature goes on until you either fill the screen with sticky bonus symbols or run out of respins. When the feature ends, the total win is paid out.
- Jackpot Prizes: Landing 6, 7, 8, or 9 bonus symbols awards a total win jackpot prize of 81x (Mini), 243x (Minor), 729x (Major), or 2,187x (Grand) your stake, respectively. If you end up with just 3, 4, or 5 bonus symbols, you win 3x, 9x, or 27x your stake, respectively. This means that 3x your stake is guaranteed per feature.
- Gamble Feature: You can gamble any win up to 7 times in a double or nothing fashion, including bonus game payouts.
- Buy Feature: For non-UK players, and anyone living in an eligible jurisdiction, you may take advantage of the Buy Feature option. Simply hit the shopping cart button below the grid, and you get the option to pay 50x your stake for the Hold the Jackpot Bonus Game with 3 triggering bonus symbols.
- Maximum Payout: The game offers a maximum payout of up to 2,187x your stake through the Grand Jackpot prize in the bonus game.

Overall, 9 Burning Dragons provides exciting gameplay with the Hold the Jackpot Bonus Game as its highlight feature. Land the necessary bonus symbols to trigger the feature and go for the jackpot prize payouts. The game's gamble and buy features also add to the excitement of the game.