The wild symbol replaces all symbols. This game is not scattered because it triggers a free spin by unlocking 9 symbol blocks in the middle of the game grid.
The Lightning slot machine we reviewed here is a 7×7 grid game with cascading symbol down and cluster payment. At least five adjacent symbols are required to win. The 40 symbol clusters range from 5x to 25x. In turn, the bet size ranges from 0.20 to 40 coins.