After last month unleashing the five-reel and twelve-payline Kung Fu Rooster video slot, Slotastic! has now announced that its portfolio is set to grow even further from next week with the addition of the new Gemtopia title.Developed by RealTime Gaming, the five-reel and 15-payline Gemtopia will go live from Monday on Slotastic!’s desktop and laptop service as well as at its recently re-designed mobile online casino for smartphones and tablets.“Free spins are triggered whenever the wild gem appears and expands to fill all three rows on its reel,” read a statement from Slotastic!.“The expanded wild is held in place during the bonus spin. Wilds that appear during the bonus spin trigger more bonus spins. Free spins are also initiated by free game symbols on the middle three reels. If three bonus gems appear during a free spin, players can click on these to reveal prizes of up to 1,000 times their bet.”To celebrate the premiere of its latest video slot, Slotastic! declared that it will be offering real-money players that have made at least one previous deposit in August the chance to enjoy up to 50 complimentary Gemtopia spins simply by entering the coupon code ‘GEMTOPIA50’ before the close of play on August 31.In addition, the online casino stated that a matching deposit bonus worth up to $444 and coming complete with 44 complimentary Gemtopia spins is to be made available to those utilizing the coupon code ‘NEWGEMTOPIA’ prior to the end of the month.