The Hellboy Wild Symbol, depicted by the logo of the game, acts as a wild multiplier, replacing others, Scatter excluded. It doubles the winnings when matched with a winning combination. The Wild symbol also generates its own winning combination when it appears on a payline: with 5 Wild you get the highest win per line, amounting to 10,000 coins.
The Hand of Death is the Scatter symbol of Hellboy. 2 or more scatters anywhere on the reels give the right to the winnings (with 5 Scatter you are entitled to 500 times your bet), while 3 or more scatter symbols in addition to the winnings, activates the bonus game Underworld, in which you can win up to 33,600 coins and where the player's mission is to identify and to secure the relic of power. The Bonus Game will take you down into hell, where you will fight fierce beasts in order to get rewards tokens. You will have to pass through 4 levels up to the room of fire and claim the precious relic. Each level consists of 5 doors, one of them hides a symbol block that will end the game immediately.
During the game, and totally at random, the Supermode feature can be activated. In this mode, the player will be given 10 Free Spins where up to 3 positions will be occupied by Wild symbols for the entire duration of the free spins. This mode cannot be activated during the Underworld Bonus Game.