Play Hall of the Mountain King Slot Game


#AD New customers only, min deposit £10, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply. +18, Please Gamble responsible.


18+. New UK/IE customers only. Sign up via a recognised affiliate partner using promo code 'STARSPINS'. Deposit and wager a minimum of £20 on slots to receive 50 free spins on Big Bass Splash, credited by 12pm GMT the following day. 10 x wagering before winnings can be withdrawn.

This promotion is for new customers only. Customers must be 18+. Customers must be residents of the UK/IE.

New customers only aged 18+. Minimum deposit £10. Get a Casino Bonus matched to your first deposit, up to £100, after you stake £20 on slots, credited within 48 hours. Bonus expires in 7 days and has a 40x wagering requirement. Additional T&Cs apply. Please bet responsibly.


18+ New Customers only. GB and ROI only. Use promocode: casino50 Minimum deposit & wager £25 on Drops & Wins slots required. 50 x 10p free spins on Big Bass Bonanza valid for 7 days, winnings capped at £500. Wagering must be completed within 24 hours of registration. Restrictions + T&Cs apply.


Visit the Hall of the Mountain King and enter a world run by trolls and finely crafted by QuickSpin. This 5 reel, 20 payline title includes a unique multiplier feature and some big symbols and it can be played on most devices and platforms.

The Hall of the Mountain King slot game is based on work by Edvard Grieg, a Norwegian composer. It’s a much-loved piece of music that was created for Peer Gynt, and a play written by Henrik Ibsen, that tells the story of the titular character waking up in a mountain surrounded by trolls.


  • Game Type: 5 reels and 20 paylines
  • Return to Player (RTP): 29%
  • Volatility: High
  • Theme: Trolls
  • Release Year: 2019


Once you’re ready for real money play, then load your account using one of the many available options, and start playing Hall of the Mountain King for real money today. Remember to gamble responsibly and to enjoy yourself!

Once you’ve had your fill of this troll-based title then be sure to check out the many other great games we have in our games room, including a host of top blackjack titles, roulette games and more.


In the Hall of the Mountain King slot game, the biggest wins can be found in the bonus spins feature. Not only will you get a handful of extra games to try your luck, but you can also win as much as 7,326x on every single one of these bonus spins.


Bet sizes 

  • Lines: 20
  • Bet: 20 to 100


  • Main: Coloured Trolls
  • Standard: Playing Card Symbols (A to 10)
  • Wild: Gold Wild
  • Scatter: Hammer

Hall of the Mountain King’s paylines pay from left to right. All 20 lines must be played and cannot be reduced (the payouts in the table are based on total bets, not line bets) and there is a betting range of between 0.20 and 100 for each spin.

Symbol2 on a Payline3 on a Payline4 on a Payline5 on a Payline
Red Trollx2x7.5x40
Orange Trollx1.25x5x20
Purple Trollx1.25x4x15
Green Trollx0.75x2x10
Blue Trollx0.75x1.50x7.5

The Multiplier Meter is one of the key features of Hall of the Mountain King and can reward players with up to 5x. This feature grows every time the Wild symbol appears. If it appears twice in a single spin, then the Multiplier Meter will jump two levels and that particular spin will be boosted with a 2x multiplier. If it appears 5 times, then the win will be boosted with a 5x multiplier.

There are numerous symbols to look out for, including the usual playing card symbols, which return smaller wins, and the trolls themselves, which are the biggest ones. The Wild is the biggest of all though and there is also a Scatter that triggers a bonus spins bonus.

This bonus is activated when 3 of the Scatter symbols appear and it goes through 3 stages. Depending on how successful they are in each of these stages, the player will either progress to the next one or leave the feature with whatever money they have generated.

  • Stage 1: This is a Symbol Upgrade feature where low payout symbols can be replaced by high payout ones. Match the symbols shown on the upgrade bar and progress to the next round if you make it all the way to the top.
  • Stage 2: This is a Wild collection stage where players are tasked with gathering a total of 6 of these Wilds, smashing each of them in turn and then advancing when the final one has been smashed.
  • Stage 3: During the final stage of this feature all of the previously collected Wild symbols will drop onto the reels and 3 bonus spins will be triggered, after which the entire feature will end.


A lot is going on with the Hall of the Mountain King slot game and it will demand your full attention. That’s why it’s great to use a tablet or smartphone to get up close and personal with the action and get the maximum enjoyment out of it.

It’s like a mobile game, one that is packed with great graphics, sound, and features and one that will keep you entertained for hours. Just remember to gamble responsibly, to take breaks and to stop when you start to feel frustrated. This can be more of a risk when using mobile devices as they can be taken anywhere, so it’s worth keeping this in mind.


If you plan on visiting the Hall of the Mountain King to see what the Troll King has in store for you, then make sure you do it with UK. This is one of the many video slots that we have available for all UK players and it’s also one of many games that are compatible with our Welcome Package, so if you don’t have an account yet then sign up today, check out our latest bonuses, and see what we can offer you.

There are many more top video slots in our games room, including more games by QuickSpin and a plethora of slots from Playtech, NetEnt, and other industry-leading developers. This selection is being updated all the time and there’s always something new to discover at UK.