300 Shields is a Spielo slot that many players will have seen and probably played in the casino. The theme of the game is based on the Battle of Thermopylae, which has been portrayed in a comic series by Frank Miller and more recently a film starring Gerard Butler and Dominic West. The slot has been recreated for online casinos by NextGen, who also developed the Medusa slot for online play.
As a big warning to all players considering playing 300 Shields, this is a highly volatile slot, more so than almost all games I have ever played. What this means is you can go through some very long periods without winning anything back, which can be both expensive and frustrating.
The extreme volatility of 300 Shields can be attributed to bonus round that has the potential to deliver some huge wins. This is triggered by landing 3 or more scattered shields on the reels. You are initially awarded 5 free spins with a 2x multiplier. This increases if you land further shields on the reels, so 2 shields will give you 5 more free spins at 5x and 6 shields adds 5 more spins at 25x and if you get 12 shields then you will add a further 5 free spins with a staggering 300x! Obviously this is very difficult to achieve, but it does happen.
I hope I have been very clear about the volatility of this slot, so hopefully you have taken on that warning. As a game it is quite fun and the blood splattering effects are unusual in a slot game, normally reserved for Vampire-themed slots like the vampire-themed Immortal Romance. I prefer 300 Shields to some of the other NextGen slots like Joker Jester and Unicorn Legend.