300 Sheilds


You normally hear electricity creating sparks, but in this energy-charged online slot from NetEnt, you can actually see Sparks fly across the reels. Chill-out music and neon graphics give the game a futuristic appearance, so it makes perfect sense that it also contains some uber-modern special features. Expanding Cloning Wilds, for example, allow enhanced wild symbols to expand across the reels and instantly create three or five-of-a-kind winning combinations. You also get to choose which of two game modes to play with – Pay One Way or Pay Both Ways.

This online slot uses five reels and twenty fixed paylines, and can you adjust the coin level as well as the coin value to give a minimum and maximum bet-per-spin of 20p and £400 respectively. The game’s house edge is just 3.46%, and you should find that wins occur fairly often.

Why we love it

Novel gameplay is one of the key reasons to play Sparks. And, it proves that online slots be just as (if not more) enjoyable when they offer something different than just the expected wild symbols and free spins bonuses.

The Expanding Cloning Wilds feature combined with the regular wild mean that you can often create multiple winning combinations on each spin. And, if you find yourself in the happy position of seeing two Expanding Cloning Wilds on the screen at the same time, you could potentially score five-of-a-kind combos across all three rows!

The ability to choose Pay One Way or Pay Both Ways, and swap between the two as often as you like, is a big advantage for players who don’t want to be restricted to games that only use one type of pay structure or the other.

Finally, Sparks is the perfect online slot for anyone wanting a relaxing playing experience thanks to its ambient, soothing soundtrack and outer space-themed graphics.


● Choose from the following coin values: 0.01, 0.02, 0.05, 0.10, 0.20, 0.50, 1.00 or 2.00.
● Use the arrows to set the bet level between 1 and 10.
● To instantly place the maximum bet with all paylines activate, click MAX BET.
● The game will take 10 to 1,000 spins on your behalf if you choose to enable the Auto-Play option.
● The ‘I’ button displays the paytable prizes plus a brief overview of the rules.


The circular blue spark marked “W” is the wild symbol, and it can appear on all five reels where it can replace any symbol except Expanding Cloning Wilds.


Expanding Cloning Wilds look exactly like regular wilds, except they’re orange rather than blue. But, they’re more powerful than regular wilds as they can substitute for all symbols including the regular wild. You’ll notice them appearing on Reels 2 and 4, and when you see one on your screen, it may expand in both directions, expand up, expand down or stay the same.

Each Expanding Cloning Wild copies the symbol directly to its left to the symbol on the right so that a three-of-a-kind win is created. When an Expanding Cloning Wild lands on Reel 2 and Reel 4 on the same spin, all of the symbols between them are cloned across the relevant row to form a five-of-a-kind win.

Return To Player

RTP is 96.54% to 96.56%. Malfunction voids all plays and payouts.