The electrifying Doctor Electro online slot is finally here, to let a vibrating current down our spines and help us get through the summer. Released in May 2019, the game stars the eccentric character of Doctor Electro, a ‘mad scientist’ type who’s running experiments in his lab only to activate shockingly fun reel action and deliver galvanized wins to all the players who dare to touch the Spin button.

Doctor Electro is set inside the futuristic laboratory of the protagonist. We can see all sorts of buttons and levers and screens and tubes and wires and shiny surfaces, and also the doctor himself on a hoverboard to the left side of the reels. The game starts as a 5-column, 4-row base game, but due to expanding reels the grid may expand to 7 rows and up the number of paying combinations. At first, the players can take advantage of 1,024 ways to win (there are no standard paying lines, matching symbols in adjacent reels deliver a payout). On the extended grid, the number of ways to win reaches a whopping 16,807!

Apart from the conventional playing card symbols, the slot has an assortment of high-paying icons of an alien with a pink liquid, a monkey with some device on its head, the doctor’s assistant, a strange female creature with an energy cube and Doctor Electro. An explosion is the Wild symbol and an energy portal is the Scatter. The user can set the size of the bet, activate automatic play, access game history and adjust the sounds.

This striking video slot includes expanding symbols which are responsible for adding new rows to the grid. The process, that happens during Hyperspins, looks like this:

• 1-2 expansion symbols collected: 5 rows

• 3-6 expansion symbols collected: 6 rows

• 7+ expansion symbols collected: 7 rows

Bonus symbols which appear on reels 1, 2 and 3 trigger free spins. However, if you don’t want to wait for the symbols to align in the way that is required you can switch on the HyperBonus feature and buy bonus spins. You will be given a choice of 25, 20, 15 and 8 spins, and each of these available options will cost you a little extra. In addition, Doctor Electro offers two jackpot prizes, the Gold level Bonus Jackpot and the Platinum level Bonus Jackpot. The pots grow with each bet placed, and they can be won only if the player lands a combination of 12 or more scattered Wild and Doctor Electro symbols or 14 or more scattered Wild and Doctor Electro symbols on a single spin.

In Doctor Electro, the HyperBonus level determined the return rate, so if you want to make the best out of the game’s potential you should play with 25 initial spins. The volatility meter is red hot so don’t enter the lab without safety gloves.