This game’s seemingly limited paytable belies its complex nature with overlapping unique bonus rounds.
As the multi-coloured scatter symbols appeared, they were collected in their respective meters to the left of the reels. When I collected enough scatters of a certain type, a free spins round with specific modifiers was triggered and I also found it was possible to simultaneously activate the different free spins rounds as the scatters kept appearing even after the feature was activated.
The Red scatters triggered the Nudging Wilds free spins where I got 5 free spins with stacked wilds that were nudged to fill the entire reel they appeared on and an expanded 5x6 reel set with 100 paylines. The Blue scatter activated Multiplier free spins that awarded me 5 free spins with random multipliers of 2x, 3x, 5x, or 10x on each spin.
The Green scatters set off Jackpot free spins, a bonus round with 10 free spins and special gold coin symbols with prizes from 1x to 10x my stake. These coins could also display letters that were collected in corresponding jackpot meters. When I collected enough letters to spell out the name of the Minor, Major and Grand jackpots, I was awarded prizes worth 25x, 50x, 500x or 10,000x my stake, respectively.
I was also able to use the Buy feature to access a menu of 7 options allowing me to trigger the individual free spins rounds or combinations thereof for between 20x and 110x my bet.
Kings of Crystals slot is an adequate vessel for a surprising feature arrangement. The game’s theme is a pleasant combination of detailed and atmospheric visuals and sounds. I wasn’t able to discern any obvious storyline or narrative to match the slot’s presentation, but it was fun to look at nevertheless.
All the slot’s action is concentrated in the three possible free spins bonus rounds and the chance to trigger them simultaneously. Having nudging wilds, multipliers, and the jackpots on-screen at the same time was an undeniably thrilling experience, but the Jackpot free spins was all that was needed to crack the slot’s maximum prize of $200 000. While this game presents intriguing features, the relatively low maximum prize and uninspired base game left me wanting something a little more spectacular.