The Great Wall 2 slot machine by WMS is part of their "Money Burst" line of slots and this one is actually a bit unique with regard to the way it does its bonus. I believe is all other Money Burst games, you can trigger the bonus in one of three ways: by filling reels 1 and 2 with the same symbol for 5 free spins, by getting bonus symbols in reels 3, 4, and 5 for 5 free spins, or by doing both for 20 free spins! In Great Wall 2, though, they changed this! In this game, if you fill reels 1 and 2 with the same symbol you receive 5 free spins, although if you receive bonus symbols in reels 3, 4, and 5, you receive 15 free spins at 3x, and if you do both, you receive 25 free spins at 3x with the potential for retriggers for another 25 spins! Another interesting point is when you trigger the bonus by filling reels 1 and 2 with the same symbol, if those symbols include wilds, the positions of those symbols will be rotated throughout your bonus. They could affect things for example if you have 2 wilds and they position themselves in reels 1 and 2 for a guaranteed win versus just on reel 1 for only a potential win. This all makes possible an ultimate scenario of triggering the bonus with 2 to 4 wilds in reels 1 and 2 along with the bonus symbol trigger in reels 3 through 5 to award 25 spins with guaranteed 3x wins for 75% or better of your spins! This would be Big Win or Jackpot time with off-the-charts potential! And of course would be extremely rare, but you can at least imagine how it could happen, Enjoy! STAY TUNED FOR OUR PROJECT LAUNCH: Please visit http://thebigpayback.com to sign-up for our upcoming launch for the world's best land-based casino locator plus other great stuff for players! SUBSCRIBE! http://www.youtube.com/subscription_center?add_user=TheBigPayback777