The reels in Heart of the Jungle are set against a lush, green, vegetation-filled backdrop with the on-screen action accompanied by animal sounds and the beat of the jungle drums. In addition to the low-value playing cards from A to 9, there are 5 high-value symbols to look out for. They are a parrot, leopard, elephant, monkey and male and female characters. The 'I can't believe it's not Tarzan' symbol is the top payer, giving you 500 coins if you land 5 in a payline.
The Heart of the Jungle logo is the wild, substituting for all other symbols bar the scatter. All the symbols apart from the scatter can appear as stacked, filling up whole reels to further boost your winning chances. The tribal mask is that scatter. Land it on reels 1, 3 and 5 and you'll trigger the Jungle Trail Free Spins feature - this feature offers better rewards the more times you trigger it.
You'll start off with 8 free spins with a 5x multiplier and the Ultra Spin which boosts your final free spin by 25x. Once you've triggered the feature 5 times, you'll receive 10 free spins with shifting stacked wilds – this means up to 4 wild stacks can appear on any spin.
After the 10th trigger, the free spins number will go up to 15, complete with nudging wilds and reversing reels – wilds stick on the reels nudging up or down on every spin with the reels spinning in either direction. Once you've triggered the feature 15 times, you'll gain access to the lost city of Zantar - here you'll be awarded 25 free spins. The extras on offer here are a rising multiplier and shifting wild.
Continue to activate the feature and you can look forward to a payment boost on trigger numbers 20, 25, 30 and 35. This means extra spins and a boost to the RTP. There are also achievements to unlock. There's little in the way of monetary reward on offer for these but you can give yourself a quick pat on the back if you so desire.
The jungle can be a dangerous place for the unwary and the same applies for slots players as the variance here is on the high side of medium. The free spins feature is the likeliest avenue to escape the jungle with a haul of golden treasure, especially if you're lucky enough to land the bumper 25x multiplier.
Indeed, if the rainforest gods are smiling, you can become a Lord of the jungle and pick up a jackpot to match. If you like the theme, Rainforest Dream by WMS is worth playing – I also recommend Gorilla Go Wild by NextGen Gaming.