Play Joker Jackpot for Free

The first thing you'll notice about the 5 x 5 window grid is that there are no complicated pay-lines to worry about, and all icons count towards wins wherever they are on the reels. The game has 7 icons to spin-in, and each has a different role to play. It's for this reason that Big Time Gaming call this series "reactor games" as they are slightly different to traditional slot machines in terms of how they function.

The Jackpot Joker, as the name suggests, is the guy who can award you up to 3 jackpots. He's not the most welcoming of jokers, in fact his smile is even scarier than the Joker in Batman, but you'll soon learn to live with that when 3 to 5 of him appear on the reels. 5 Joker Icons are what you really want to see as these award the Maxi Jackpot, but 4 and 3 are still well worth the effort as these respectively award the Midi and the Mini Jackpots.

The game's Bonus Icon is the Treasure Chest, and this triggers the Chest Big Win Bonus in which you simply have to click on the Chest to reveal a guaranteed win.

The other 5 icons are the pay-table prize icons, and any amount between 5 and 16 of any of them will win you a prize – with multiple wins being a common occurrence. You can win up to £100,000 if you manage to find 16 of the green-haired warrior, who is the game's top-paying icon, and he looks very similar to those little trolls that used to make great key-rings.

Lucky Streak Icons also serve two functions as they can award prizes upwards of 40x your line-bet right up to 2,000x your line-bet if you land 5 on the reels. 3 or more icons will also trigger the Trail Bonus and/or the Cash Stoppa Trail Bonus. The Trail Bonus awards the payout lit when the bonus finishes. Meanwhile, you can gamble your prize on the Cash Stoppa Trail Bonus, as the light flicks from Advance to Collect. Hit advance and you will continue to climb the prize board which goes 40x, 60x, 80x, 100x, 120x, 150x, 200x, 50x, 1,000x, 1,500x, right up to the maximum prize of 10,000 your line-bet. However, hit collect and your bonus will award that line-bet multiplier.

The other 4 icons are a cute young lady wearing a daisy chain around her head, a willing young warrior wearing a horny helmet, a Thor-like hammer, and a blue and red battle-shield, and winning combos pay between 0.01 and 6,000x your line-bet.

The coolest feature of the whole game though is the Tumbling Reels Feature. When you hit a winning combo or multiple winning combos, you will see those wins registered in a box to the right of the reels. However, all winning icons will then disappear and will be replaced by more symbols that tumble from above. This process will continue until no more winning combos exist – when your total prize for that spin will be added up!

With no lines to worry about, choosing your spin-stake is as easy as choosing which bet you want to play for, and these range from 0.25 coins to 1,000 coins a spin – though you might want to consider the more you bet the more you can win on any spin.

Big Time Gaming are always trying to produce great slot games that have an enjoyable mix of proven winning features, with a little bit of novelty thrown-in – and they've achieved it here. The freedom of winning simply by how many symbols accumulate on the reels is exciting, whilst 25 windows add even more excitement to the tried and tested Tumbling Reels Feature!