Age of the Gods: King of the Underworld Slot Review
A dark Greek afterlife slot with two pick-me bonuses and four jackpots
King Of The Underworld Ratings
Age of the Gods King of the Underworld has been rated by our slots review team and scores an awesome 85% based from the category ratings overall.
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King of the Underworld Slot Overview
King of the Underworld is a dark Greek mythology slot from the Age of the Gods series. It’s set in the ancient Greek afterlife, a gloomy world of marble pillars, skulls and flames.
Famous figures from the underworld appear on the reels. You’ll meet Cerberus, the three-headed guard dog, along with the Fate Sisters and Hermes. Charon, the ferryman of the dead, is the scatter. Tartarus, a place of torment in the myths, is the wild.
The game plays on 5 reels with 20 paylines. Instead of free spins, it has two pick-me bonus games. Our original review listed an RTP of 96.02%, and the four Age of the Gods jackpots are always in play.
King of the Underworld at a Glance
| Developer | Playtech (Age of the Gods series) |
| Theme | The ancient Greek underworld |
| Layout | 5 reels, 20 paylines |
| RTP in our original review | 96.02% |
| Bet range in our original review | 0.20 to 40 per spin |
| Wild | Tartarus, the top-paying symbol |
| Scatter | Charon, paying up to 100x your total bet |
| Bonus games | Gates of Hell and Thread of Fate |
| Jackpots | Power, Extra Power, Super Power and Ultimate Power |
Theme and Design
King of the Underworld is darker than most Age of the Gods games. Marble pillars and skulls frame the reels, and the card symbols are wrapped in flames.
Our original review called the visuals exceptional. A sweeping orchestral score adds to the dramatic feel. It’s a great choice if you like your mythology slots with a spooky edge.
Paylines, Betting and RTP
King of the Underworld has 20 paylines. Wins pay when matching symbols land on a line.
Our original review listed bets from 0.20 to 40 per spin. The RTP was 96.02%, which is right on the online average. That’s a good figure for a jackpot slot, since part of each bet funds the progressives.
King of the Underworld Symbols
Our original review listed these symbols:
- Tartarus: the wild and the top-paying symbol.
- Charon: the scatter, paying 5x, 25x or 100x your total bet for 3, 4 or 5.
- Cerberus: starts the Gates of Hell bonus.
- The Fate Sisters: start the Thread of Fate bonus.
- Hermes: a premium character symbol.
- Flaming A, K and Q: the lower-paying symbols.
Our original review said the best standard symbol pays 50x your bet for five on a line.
The Tartarus Wild
Tartarus is the wild. It substitutes for all symbols except the scatter and bonus symbols.
It’s also the biggest payer in the game. Our original review said filling the reels with Tartarus pays 10,000x your total bet. Five on a line pay 500x your bet.
Gates of Hell Bonus
Land 3 or more Cerberus symbols on the same spin to trigger this bonus. You work your way through the underworld by choosing doors.
Each door reveals a cash prize. You keep picking until you either release Cerberus or make 6 successful picks. When the bonus ends, all your wins are multiplied by the number of paylines you’re playing.
Thread of Fate Bonus
Three Fate Sisters trigger the Thread of Fate bonus. You pick from spindles as you weave your way through the feature.
Watch out for Atropos, the sister who cuts the thread of life. Our original review said the feature continues until a chosen thread is cut. As with Gates of Hell, all wins are multiplied by the number of paylines you’re playing.
Understanding Pick-Me Bonuses
Pick-me bonuses are interactive features. Instead of watching the reels spin, you choose items on a separate screen to reveal prizes.
They add a sense of control, even though the results are still random. In King of the Underworld, both bonuses multiply your wins by your active paylines. That’s why playing all 20 lines makes such a difference to the size of your bonus prizes.
Age of the Gods Jackpots
Like every Age of the Gods slot, King of the Underworld is linked to four progressive jackpots. The jackpot game can trigger at random on any spin.
When it does, you pick squares until you match three jackpot symbols. You win the matching jackpot: Power, Extra Power, Super Power or Ultimate Power.
How to Play King of the Underworld
- Check the help screen: confirm the RTP and bet range at your casino.
- Keep all lines active: bonus wins are multiplied by your lines.
- Spin the reels: wins pay on 20 lines.
- Find 3 Cerberus symbols: this starts Gates of Hell.
- Find 3 Fate Sisters: this starts Thread of Fate.
Who Is King of the Underworld Best For?
King of the Underworld suits players who enjoy pick-me bonuses rather than free spins. The two bonus games offer a more interactive experience.
It’s a good fit if you:
- Like dark themes: skulls, flames and the Greek afterlife.
- Enjoy pick bonuses: two different games to play.
- Want a solid RTP: 96.02% is good for a jackpot slot.
If you love free spins rounds, this game may not be for you. It doesn’t have one.
Tips for Playing King of the Underworld
- Play all 20 lines: both bonuses multiply wins by your active lines.
- Aim for 6 picks in Gates of Hell: that’s the best possible run.
- Watch out for Atropos: she can cut the thread in Thread of Fate.
- Don’t chase the jackpots: they’re random.
- Set a budget: decide your limit before you start.
The Myths Behind the Game
In Greek mythology, the underworld was ruled by Hades, brother of Zeus. Charon ferried the souls of the dead across the river Styx. Cerberus, a three-headed dog, guarded the gates so no one could escape.
The Fate Sisters spun, measured and cut the thread of each person’s life. Atropos was the one who made the final cut. Tartarus was the deepest pit of the underworld, a place of punishment. The game turns all of these into symbols and features.
About the Age of the Gods Series
Age of the Gods is one of Playtech’s most popular slot ranges. Every game shares the same four jackpots, but each has its own theme. King of the Underworld stands out for its dark setting and pick-me bonuses. For a brighter game, visit Zeus in King of Olympus.
Playing on Mobile
Playtech builds its games in HTML5 for desktop and mobile. If your casino offers King of the Underworld, it should run in your phone’s browser.
Many casinos also offer demo play, which is a good way to learn the features before you bet real money. ## What We Changed in This Review
- Status note: we’ve added that Playtech doesn’t publish a game page, so figures come from our original review.
- Myths section: we’ve added background on the figures from Greek mythology.
- Structure: we’ve added a quick-reference table, tips and FAQs.
Pros and Cons
Pros
- Two pick-me bonus games
- Bonus wins multiplied by your paylines
- RTP of 96.02% in our original review
- Four Age of the Gods jackpots
Cons
- No free spins round
- RTP not published by Playtech
- Bonuses can end early
- Narrow bet range
Our Verdict
King of the Underworld is a dark, atmospheric Age of the Gods slot. The two pick-me bonuses make a nice change from free spins, and the line multiplier can make them pay well. The RTP is solid for a jackpot game. If you like Greek myths with a spooky edge, it’s worth a trip to the underworld.
Similar Slots to Try
For another dark Age of the Gods game, read our Ruler of the Dead review. If you enjoy the Fate Sisters, try Fate Sisters.
King of the Underworld FAQs
Who made King of the Underworld?
Playtech made it as part of the Age of the Gods series.
How many paylines does it have?
It has 20 paylines on 5 reels.
Does King of the Underworld have free spins?
No. It has two pick-me bonuses instead: Gates of Hell and Thread of Fate.
How do I trigger Gates of Hell?
Land 3 or more Cerberus symbols on the same spin.
What is the top win?
Our original review said filling the reels with Tartarus wilds pays 10,000x your total bet.
What is the RTP?
Our original review listed it as 96.02%. Check the help screen at your casino to confirm.
What is the Thread of Fate bonus?
A pick-me bonus triggered by three Fate Sisters. Wins are multiplied by your active paylines.
Jackpot slots are exciting, but always play within your limits. For tips on staying in control, visit our responsible gambling page.
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