House of Doom uses the Seer as its Wild, while the haunted house and skull have different Scatter roles. On each spin one reel is highlighted for Hellgate. A Seer landing there expands over the reel, changing the current line results.
House Scatters on reels one, three and five can award ten Doom Spins. The skull opens its own pick feature in the base game, so it should not be confused with the free-spin trigger. The licensed music and horror setting are visual themes; the reel highlight and separate Scatter symbols are the useful rules to check before a round.
Related games
Compare Wild Blood and Necromancer for a different rule set.
Source: Play'n GO game information.
