The reels in the base game are set against a rural backdrop and include butterflies, fish, swans, flowers and mushrooms - the magic book, tree and pot of gold coins will each net you 600 coins if you land 5 in a payline. The lucky leprechaun is the top paying standard symbol, offering up to 1,000 coins. They are done cartoon style and have a light-hearted feel in keeping with the theme.
The first feature to note is the Wild Rush feature - when a wild symbol lands, the chances of hitting another wild directly above or below greatly increases. It's possible to fill the entire reel with wilds in fact - these stacked wilds only land on columns 2, 3, 4 and 5 and substitute for all other symbols bar the bonus and jackpot symbols.
Land 2, 3 or 4 bonus symbols on the middle reel and you'll trigger the Free Spins Bonus feature and be awarded 8, 16 or 24 free spins. On each free spin, the Leprechaun Bonus ensures that between 1 and 4 wild symbols will appear on the top row, guaranteeing a wild rush to really boost your chances. The free spins can be re-triggered on multiple occasions too with up to 240 possible!
Finally, there's Isle O' Plenty's chief attraction, the Mega Jackpot - there are a number of ways that you can win the big one. Land 4 Mega Jackpot symbols on the middle column during any base game spin, do the same in the Free Spins feature or win the behind the scenes Second Chance, and the champagne corks will be popping. The bigger the stakes you're playing, the better the chances of landing the latter option.
The overall variance in Isle O' Plenty is in the medium range offering a balance of payouts. Like similar IGT progressive slots Siberian Storm and Cleopatra, the chief draw in Isle O' Plenty is the progressive jackpot that can deliver truly life-changing sums of cash.
Even without the enormous potential jackpots, there's enough here to keep you entertained courtesy of the free spins and the Wild Rush features. And if the luck of the Irish is with you, then MegaJackpots Isle O' Plenty can certainly live up to its name. If you like Irish luck-themed games, you should definitely try Rainbow Riches from Barcrest.