Hidden is a 5 reel, 178 ways to win slot from ELK Studios that takes you back to ancient Egypt. Playable from 20p to £100 a spin on desktop, mobile and tablet devices, it offers you respins, free spins, sticky wild symbols, expanding symbols and cascading wins – it’s also highly volatile.

Visually, you are taken to the Great Pyramids of Giza with historian Professor Taylor and his nephew Benjamin as they go in search for the golden top-stones. As you’d expect from an ELK Studios offering, it looks fantastic. Symbols on the reels including A, K, Q, J and 10 playing cards as well as camels, Sphinxes, Benjamin and Professor Taylor themselves. Look out for the wild symbol that substitutes for all other symbols except the scatter. It’s full of colour and offers you a catchy and vibrant soundtrack.

When it comes to features, Hidden has 2 – first up is the Flashback Respins feature which is randomly triggered on any base game spin. You will see the sky and clouds come to life as you get a glimpse back to ancient Egypt – you are rewarded with 3 free respins with 1, 2 or 3 of the central reels covered with sticky wild symbols.

The main attraction is the Treasure Room Free Spins feature – this is played when you get 3 or more magnifying glass scatters anywhere on the reels. This will give you 5 free spins. 1 of the symbols present on the reels is randomly chosen to become the expanding symbol.

When this appears during a free spin, it will expand to create a 2×2 big block of that symbol. All other symbols will disappear to give you a second symbol drop – this can lead to the expanding symbol landing which will give you more 2×2 blocks. Look out for the magnifying glass appearing as each 1 will give you an additional free spin. To win big, you would need a higher value symbol.

Hidden may have a common theme but it does offer something unique in terms of gameplay – it can be highly rewarding in both the base game and 2 bonus features which is good. I like the Flashback Respins feature due to the potential of the 3 fully wild reels for 3 respins.

However, the bigger wins will come in the Treasure Room Free Spins feature due to the expanding symbols and subsequent symbol drops. It’s a highly volatile offering with maximum payouts of 2,150 times your stake on each spin! Yet again, ELK Studios has released another superb slot – I also recommend you try some of their other games with Wild Toro and Sam on the Beach good choices.