202199.00%High Volatility

Relax Gaming rewrites history in Book of 99, where players battle amongst the gods in a first-of-its-kind 99 RTP 'Book of' slot!

Collecting 99 books in the Base Game triggers 10 free spins, an added route to the typical 3-symbol trigger. In this Greek odyssey warriors are welcome, one is chosen at random before heading into the ancient empire in the Bonus Round. Once the mythical character is chosen, it gains expanding abilities in the Free Spins round, growing to fill the whole reel and catapulting win potential up to 5000x one’s bet!

Relax Gaming
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Users Reviews

  1. David Strömberg

    The RTP of this slot is amazing!

    9.0 rating

    The RTP of this slot is amazing!

  2. Jeff

    not the best game, but I play it just because the rtp is so high

    8.0 rating

    not the best game, but I play it just because the rtp is so high