RTP and Symbols
Book of Thor has a payback rate or RTP of 96.05%. The premium symbol Thor acts as an expanding symbol when it lands. More to the point, it uncovers entire reels.
The other symbols also complete the Norse mythology theme. They are Mjilnor (Thor’s hammer), helms, shields, horns, and books. The Wild symbol replaces adjacent symbols when it completes winning combinations.
Finally, the low-value cards from 10 to Ace conclude the symbol lineup. Once you’re ready to play for real, you can spin from 10 cents to $100 per spin.
Bonus Rounds
Free Spins
The only special feature Book of Thor has is a free spins bonus. You need 3, 4, or 5 Book scatters to “unleash” 8, 12, or 25 free spins. Before the bonus game starts, it chooses a random symbol.
The symbol acts as an expanding symbol for the duration of the free spins. See it as a special treat that boosts your earnings when it lands. Now, this is where it gets interesting.
Remember the Wild? When it lands with the expanding symbol the payout can be legendary. Hopefully, the wins you derive from it will catapult you to Olympus.
What’s the average free spin trigger? I have no idea because Qora Games hasn’t released the casino game yet. However, I’ll make a calculated guess by saying around 80-90 spins.
So, if your average bet is $5 you need $400 to $450. Even if you trigger the free spins, it doesn’t guarantee you a big win to cover your losses triggering it. Then again, you could also win the jackpot, that’s online slots play for you.
Tips and Strategy
What’s the best wager to play the slot for real money? I’ve seen a win of $210 for a wager of $2.75, that’s a payout of 76.6x your stake. That tells me you don’t have to play for high stakes to win big.
It’s also one of the reasons why I love playing volatile slot games. Is it wise to play the Book of Thor slot with a bonus? Yes, but it also depends on where you play.
High Roller Casino offers a bonus of $4,000 with a 400% match-up and a rollover of 35x. Is it worth it to play with bonus funds? Here’s a hypothetical scenario:
Let’s say you deposit $50 which gives you $250 to play with. Since the Book of Thor is quite volatile you can expect a few dry spells, but bigger wins can land.
It’s a medium to high variance slot with a 96.06% RTP. The wagering requirement is 35x your deposit plus bonus, therefore, you must wager ($50 + $200) × 35 = $8,750.
With a 96.06% RTP, the house edge is 3.94%. Over hundreds of spins, that edge would eat into your balance because the Book of Thor is high variance.
Admittedly, the bonus gives you extra playtime, but clearing the wagering can be hard, even on small deposits. Ultimately it all boils down to luck.
Test the game with free credits and factor in like you’re playing it with bonus funds. That gives you an idea of what to expect when you play it for real with a bonus.
Conclusion
Qora Games goes back to basics with the Book of Thor. It’s not a groundbreaking slot, nor is it a throwaway effort. The studio delivers a game that leans on familiar mechanics but still packs enough punch to keep things interesting.
The free spins feature isn’t the smoothest ride. It can feel like a grind, but once you trigger the Thunderblast Bonus, things can heat up fast.
The expanding symbol mechanic adds an extra layer to the bonus round. You can land a high-value symbol for massive payouts, but it might only appear once or twice.
Conversely, a low-value expanding symbol hits more often, providing steadier returns. If I had to choose, I’d take the consistent payouts over waiting for a big hit that may never come.
If Book of Thor feels too by the numbers, check out Jenny Nevada and the Diamond Temple from Rival Gaming.
This slot channels an Indiana Jones/Tomb Raider-style adventure and delivers more variety with its Temple Maze feature, free spins, and a 10,000x jackpot.
