On those rusty reels, you’ll see symbols of: 3 Explorers, Old fashioned Compass with Eye glass, Survivors backpack, Oil lamp, Leather notebook also playcards with low value. The Wild symbol, represented by Earth's core while the Scatter, is a massive Underground Drill. Landing 3 or more, the player is rewarded with 10 Bonus Spins. At the beginning of the Bonus the player can choose, 1 of the 3 Researcher Symbols. The chosen symbol, Stays at the position it occurs until the Bonus round ends and pays, as Wild!
In overall, this slot may not come with all the latest advanced visuals and sounds, but manages to deliver an old but Nostalgic, arcade action. Still, one of my favorites!