9 Line Bonus Slots were introduced by Microgaming to their Viper casino gambling suite back in 2003. The first titles of these popular bonus slot machines were Thunderstruck, Ladies Night and Spring Break. These slots all offered 15 free games when three or more scatters dropped into place anywhere on any pay line. The bonus round would then pay-out 3x the original bet. Just like in normal game mode if Thor was included in the winning slot line pay-out the win would be doubled.
As you can see I still enjoy playing the Thunderstruck bonus slots, this also includes Spring Break and Ladies Night too. After Microgaming released Kathmandu bonus slot, it seemed that the group began to put all of its effort into creating new versions of 30 line bonus slots and even their subsequent release of Dolphin Tales a never before seen 40 line bonus slot was a testament to this.
The following 9 line bonus slots come highly recommended, and can be played at all Microgaming casinos: Good to Go, Kathmandu & Secret Admirer.
