Microgaming has in its portfolio a series of online slots games sub titled Power Spins. The commonality in these three slot machines is the optional Power Spins feature, which requires an additional wager and offers an additional benefit in return. The difference is a different advantage in each of the Power Spins online slots. The slot games are live at all Microgaming online casinos like All Slots, 32Red and Platinum Play.

Power Spins Sonic 7s incorporates symbols from classic slots such as different 7s and different bars along with cherries and bell. They are represented in a steely blue colour. The wild symbol is the game logo and the scatter symbol is the scatter logo. When the Power Spins feature is activated, all the 9 paylines are enabled and an extra amount equal to three times the line bet is added to the wager. With the feature activated, each wild symbol on the reels individually doubles the payouts. Therefore if you land three wild symbols then the payout will be multiplied six times. The multiplier is capped at eight times, but you will rarely get more than four wild symbols.

The second slot game of the Power Spins series is Atomic 8s. The same classic slots symbols have been used as in Sonic 7s. However, they are in their natural colours and have a flaming background. The atomic logo is the wild symbol and the radioactive sign is the scatter symbol. These differences help in giving Atomic 8s video slot its own identity. The Power Spins feature costs the same, but in Atomic 8s the benefit is different. Winning combinations pay out both left to right and right to left. This effectively doubles the number of paylines and creates more winning opportunities.

Nuclear 9s is the third slot game of the Power Spins series. Like the other slots in the series, Nuclear 9s is also a 9 paylines video slot. The same classic slot symbols are used, but against a background of deep green this time. The game logo is the wild symbol and the nucleus of the atom is the scatter symbol. When you play Nuclear 9s with the Power Spins feature activated, the symbols in winning combinations fade away and new symbols fall down to take up the empty spots. If a new winning combination is formed then the process repeats. This will keep happening till you reach a configuration without any wins. With each repetition the payout multiplier increases by 1.