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Elk Studios
RTP 96.3%
Play Elk Studios Slots
Reels 5
Paylines 178
Min bet size
Max bet size
RTP 96.5
Wild symbols Yes
Free spins Yes
Bonus Yes

Hidden Slot Review

The Hidden game can be found at casinos offering Elk Studios software. Elk Studios are a small but quickly growing casino software developer primarily focusing on the mobile market. At the present time they only offer slots games. Players should be aware that this software provider includes ‘betting strategies’ as an automated feature. These should be avoided. They offer no mathematical gain to the player and increase the risk of large losses in comparison to your bankroll. As a standard Elk Studios do publish the RTP/House Edge information for their slots games within their game paytable. As such we can say that the House Edge of Hidden is 3.7%.

Hidden is made up of 5 reels, each one 4 symbols high. There are no paylines, instead the game works using way lines, of which there are 178 in total, playing from left to right.

Special Symbols

Wild – The “Wild” symbol is easy to identify, as it has “Wild” written across it. The “Wild” symbol substitutes for all symbols other than the “Magnifying Glass” symbol and only appears on reels 2,3 and 4.

Scatter – The “Magnifying Glass” symbol is the game’s Scatter.

The Professor - The most valuable symbol in the game is the “Professor” symbol. 3 “Professor” symbols in a winning combination will award you with 250 coins. 4 “Professor” symbols in a winning combination will award you with 500 coins and 5 “Professor” symbols in a winning combination will award you with 1000 coins.

Bonus Features

Flashback Re-Spins – These are triggered randomly. When they do trigger up to 3 stacked “Wild” symbols can appear on reels 2,3 and 4. After they have appeared they will stick in place for 3 spins. Additional Wilds act as normal during the “Flashback Re-Spins”.

Treasure Room Free Spins – To trigger the game’s free spins you need to reveal three or more of the “Magnifying Glass” symbols. When this happens you will be awarded 5 free spins. Every time a “Magnifying Glass” symbol appears during the free spins you will be awarded one additional free spin. During the free spins one symbol on the reels will be chosen at random to expand and fill the reel after the initial spin has finished. All other remaining symbols will also be replaced with new symbols.


“Hidden” is a solid offering from Elk. The symbols look good and there’s a fairly interesting introduction to the game that adds a narrative to the proceedings. The free spins double up as a bonus and on their own add some interesting gameplay but, without being too greedy it would be so much better to have an additional, separate bonus round. The house edge is the level we’ve come to expect from Elk Studios and about average for a slots game in general. However, the “Advanced Betting Strategies” that are built into this game are seriously bad news for us. They are sold as an advantageous game feature, when these strategies offer the player no improvement over flat betting. The reality is that if you increase your bet, you’re more likely to lose money than you are to make any. This is poor practice, dragging everything positive about the game down. We would be highly critical of any website offering bogus betting strategies so a game developer doing this is even more problematic for us. If these “Advanced Betting Strategies” were not in place I’d be giving this game a rave review, so here’s hoping that Elk see sense and remove this from future releases.

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