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But the Spartan-themed 300 Shields Extreme by NextGen Gaming is definitely deserving of that title. The base game itself can seem a little standard, with a basic 5×3 layout accompanying a 95.29% RTP and high volatility. Though what makes it extreme is its bonus rounds and how you reach them.

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There’s a huge variety of online slots out there – and the best slots sites have them all. Their more recent games, Starlight Princess, Gates of Olympus, and Sweet Bonanza play on an 8×8 reel setting without any paylines. Players must land 8 symbols anywhere on the reels to receive the corresponding prize.

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