When you get a bonus symbol it has one or more brain symbols on it. The reason for this is each bet level has a persistent state bonus meter. This is unusual, but the game spells it out. One thing that sets this game apart right up front is at the $1.60 and $3.20 bet levels, the ability to trigger a bonus increases.
The reel set is a 5×4 reel set with 40 lines. The game is somewhat complex with its variety of bonuses, but the baseline game, and the potential advantage, is pretty easy to spot. One of the games they produced a few years ago that still has its fans is Plants vs. Spielo, now under the IGT umbrella, was among the earliest to produce games with persistent state reel design that could lead to Advantage Play opportunities. Brain meter is persistent for each bet level. What Makes it Special: Brain meter leads to a bonus when filled.
