A little over a month after launching the five-reel Ninja Power slot and Slotland has further expanded its portfolio following its premiere of the 21-payline Slot 21 game.Described as a ‘retro arcade-style slot’ featuring a built-in and blackjack-inspired bonus card game, Slot 21 has playing card numbers and symbols spinning on its five reels while players that collect five crown icons can trigger the online casino’s site-wide progressive jackpot, which currently stands at over $200,000.“Slot 21 has been very popular at Slotland’s sister site, WinADay Casino, since it launched a few years ago so I’m sure Slotland players will enjoy it as well,” said Michael Hilary from Slotland.“The bonus round is inspired by blackjack and by collecting jacks, queens, kings and aces on the slot machine reels, players earn 21 Cash, which can then be used to play a hand of blackjack. When they draw cards that come closer to 21 than the bank’s hand without going over, their wager is doubled. Red and black scatter symbols landing on Slot 21’s right-most reel triggers an optional red and black bonus game where players can double the winnings of their last spin.”Those with previous Slotland deposit history wanting to try out Slot 21 can receive a complimentary voucher worth $17 simply for using the coupon code ‘FREEBIE’ before the end of the month while entering ‘SLOTS100’ will entitle aficionados to a matching deposit bonus that can be used up to three times a day. Online casino players can also take advantage of a 70 percent deposit bonus with a ten-time wagering requirement and a 30% windfall featuring a five-time condition simply for entering the codes ‘HOTDEAL70’ and ‘LOWWAGER’ respectively.