300 Shields Extreme Slot Review

Expert Rating: 4 out of 5
Review by Chris Taylor
Last update 11th December 2021
Review by Chris Taylor
Last update 11th December 2021

The 300 Shields Extreme slot is powered by NextGen Gaming and is the sequel to the cult favourite 300 Shields. With 5 reels and 25 paylines, you can spin away from as little as 25p per bet. With a Spartan theme, it’s all about the Battle feature where wins involving the Warrior wild can lead to multipliers up to 300x and max wins of 17,773x. Discover what else is on offer in our trustworthy 300 Shields Extreme review.

300 Shields Extreme Max Win
17,773 x bet
NextGen Gaming
Type of Slot
Video slot
Stakes Range
25p to £12.50
Bonus Features
Yes (2)
Free Spins/Multiplier
Max Win
17,773 x

300 Shields Extreme Demo

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300 Shields Extreme Slot RTP, Details and Wager Limits

Reels/Paylines: 5 reels + 25 paylines

Stakes Range: 25p to £12.50 per spin

RTP: 95.3%

Max Win: 17,773 x stake per spin

The 300 Shields Extreme slot game is played on 5 reels with 25 paylines. Winning combinations are formed from left to right, starting from reel 1, by landing 3 or more matching symbols across any of the paylines. The exceptions are the wild, scatter, fighter and ship symbols where only 2 are needed to land a winner.

You can spin away from 25p to up to £12.50 per bet across all devices. The maximum used to be a little higher but this has since been reduced. Simply use the + and – buttons above and below the spin button to adjust your total bet.

The 300 Shields Extreme RTP is 95.3%, which is quite a way under the average of 96% for a slot of this type. In terms of variance, it’s on the high side, so don’t expect big wins too often.

The maximum win here is 17,773 x your stake, which is best achieved during the bonus feature where a 300x multiplier is up for grabs.

Theme – Audio and Design Features – An epic Spartan battle

Theme: Spartan

High Value Symbol: Shield Scatter

Compatibility: Mobile, Tablet, Desktop


Visually, the 300 Shields Extreme slot is almost identical to the original, although the graphics and animations have improved in this version. Set on a rural hillside with temples in the backdrop, it has a calm feel to it and the game is loosely based on the blockbuster movie 300.

Symbols on the reels include Spartan style A, K, Q, J, 10 and 9 royals as well as arrows, swords, ships and fighters. The most rewarding symbol is the shield scatter, and 2, 3, 4 or 5 on a payline will give you 2, 5, 12 or 100 x your stake.

3 or more scatters will trigger the Battle feature where you’ll begin with 5 free spins. The Warrior is the wild symbol and substitutes for all symbols bar the scatter. 5 on a payline will reward you 40 x your total stake.

It’s worth noting here that any winning combination involving the Warrior wild will add a 2x multiplier to your winnings.

Symbol Payout
300-shields-extreme-slot-9-symbol9 3, 4 or 5 = 0.16, 0.4 or 4 x stake
300-shields-extreme-slot-10-symbol10 3, 4 or 5 = 0.16, 0.4 or 4 x stake
300-shields-extreme-slot-j-symbolJ 3, 4 or 5 = 0.2, 0.48 or 5 x stake
300-shields-extreme-slot-q-symbolQ 3, 4 or 5 = 0.2, 0.48 or 5 x stake
300-shields-extreme-slot-k-symbolK 3, 4 or 5 = 0.5, 0.6 or 6 x stake
300-shields-extreme-slot-a-symbolA 3, 4 or 5 = 0.5, 0.6 or 6 x stake
300-shields-extreme-slot-arrows-symbolArrows 3, 4 or 5 = 0.6, 0.8 or 8 x stake
300-shields-extreme-slot-dagger-symbolDagger 3, 4 or 5 = 0.6, 0.8 or 8 x stake
300-shields-extreme-slot-ship-symbolShip 2, 3, 4 or 5 = 0.08, 0.6, 4 or 10 x stake
300-shields-extreme-slot-fighter-symbolFighter 2, 3, 4 or 5 = 0.08, 0.6, 4 or 10 x stake
300-shields-extreme-slot-scatter-symbolScatter 3+ triggers battle feature and pays up to 100x
300-shields-extreme-slot-wild-symbolWild Substitutes for all except scatter + pays up to 40x

300 Shields Extreme Mobile


You can play 300 Shields Extreme on all devices smoothly with HTML5 technology. This means it’s playable on PCs, laptops, smartphones and tablets. The visuals look great on smaller Android and iOS screens.

300 Shields Extreme Bonus Features

With a Spartan theme, it’s all about the Battle feature where wins involving the Warrior wild can lead to multipliers up to 300x. Players outside of the UK can also buy the feature, which we’ll expand on shortly.

Battle feature


3 or more scatters in the base game will trigger this feature. The key to the Battle feature is to collect shield scatters as these will reward you with more free spins as well as increased Warrior wild multipliers up to 300x:

2+ scatters 5 more free spins + 5x multiplier
6+ scatters 5 more free spins + 25x multiplier
12+ scatters 5 more free spins + 300x multiplier

If you land 3 shields during a free spin, you will get another 5 free spins in the stage you’re in. If you were to do this in the final stage, you could get a 300x multiplier.

However, getting to the final stage isn’t easy as this 300 Shields Extreme slot is as volatile as they come. But if you do manage it, there’s a huge 17,770 x your total stake to be won from every free spin involving the 300x wild multiplier.

Buy Pass feature

This feature is where you can buy your way into the Battle feature for 60 x your stake. But please note that it’s not available to UK players.

300 Shields Extreme Review Summary – A step up from the original

Theme & Symbols

Sounds & Music

Bonus Features

RTP (95.3%)

Max Win (17,773 x)


The main differences from the original game are the improved graphics and animations. Whilst this 300 Shields Extreme slot is recommended, we would like to have seen more bonus features added from the previous version.

We’d recommend trying the demo first to see if you like it. But if you’re a fan of highly volatile slots, this one might be for you.

Other slots to consider with a similar theme include WMS’ Spartacus Gladiator of Rome and Tiger’s Glory Ultra from Quickspin where the max win there is a whopping 32,464x.

  • 17,773 x max win
  • Unlimited free spins
  • Great on mobile
  • Highly volatile slot

300 Shields Extreme FAQs

What is the 300 Shields Extreme RTP?

The 300 Shields Extreme RTP is 95.3%, which is quite low when you consider the average online slot RTP is 96%. Due to its high variance, expect lower wins a lot more frequently than bigger ones.

What is the 300 Shields Extreme max win?

The maximum win is 17,773 x your stake, which is quite generous for this highly volatile slot. Your best chance of achieving this is during the Battle feature and getting the 300x multiplier.

Are there 300 Shields Extreme free spins available?

Yes. Landing 3 or more scatters will trigger the Battle feature, which will give you 5 free spins initially. Land more scatters during the bonus round to increase the number of free spins awarded. Up to 300x multipliers are up for grabs too.

Is there 300 Shields Extreme free play available?

Yes. Try the 300 Shields Extreme slot in demo mode right here at Online-Slot.co.uk. There are thousands of slots to play for free that include detailed reviews on each game.