Tropic reels is a 'multi-spin' video slot machine, meaning there's more than one set of reels on the machine, and you'll have a chance to match symbols on each set of reels.

• There's 5 reel sets in total - and each 'spin' begins with setting the first set of reels along the bottom.
• After the first set of reels is done spinning, you have the option of holding any symbols you'd like.
• Any symbols you've held will appear on each of the 5 reel sets.
• You then spin again - and all reels that do not have held symbols will spin until the game is set.

It's a fun diversion from 'regular' slots, and the act of holding symbols allows you to 'go' for particular matches more often. Definitely worth a try if you haven't experienced it before.