Reef Run is a Video Slot with 5 reels and 20 paylines oriented from the left to right.
The game has six regular symbols that win if three or more are lined up in sequence on a payline, beginning in the leftmost position. The Level Multiplier multiplies the winnings of a symbol when it is hit several times during a Free Spin round. When a symbol has a win for the first time, the win is multiplied by x1. The second time it is multiplied by x5, third time x10 and fourth time x20. Further wins on the symbol are also multiplied by x20. If there are two wins on one symbol in the same spin, the same multiplier is applied to both wins.