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  1. Home/
  2. Rules/
  3. Hot Gems

Online Casino Games - Rules Explained

Hot Gems

Dig deeper to find great riches!5-Reel 25-line Slots

5-Reel 25-Line Slots

Hot Gems online casino slot is one for players who like to win again and again. The unique Collapsing Reels feature allows you to rack up multiple wins in a single spin. Slot fans at William Hill Casino will love the Win Multipliers available in the Free Games Bonus. Put simply, this game is hot property!

The aim of the base game in Hot Gems slot is to spin the reels and match symbols on the paylines.

To Play the Game:

  • You must first choose your Line Bet. Do this by using the +/- buttons on the bottom of the screen.
  • The number of paylines is always fixed at 25. This cannot be adjusted. Therefore the Total Bet is always calculated as Line Bet x 25.
  • When you have selected your Line Bet, press Spin to start the Hot Gems slot. When the reels have come to rest any winning combinations will be highlighted on screen and the amount won will be highlighted in the Win Box on the bottom centre of the screen. The winning symbols will then ‘explode’ (Collapsing Reels) with new symbols falling to the reels to take their place. If another win occurs the process is repeated again. There is no limit to the amount of times you can keep winning with Collapsing Reels.
  • When the reels are spinning the Spin button will read Skip. Click on this if you want to speed up the animations and go directly to the game result. This will also speed up the process of the collapsing reels.
  • You can also spin the reels using the Auto Play function. This allows you to set a predetermined number of spins to be played through consecutively. Click on the Auto Play button and choose between 10, 25, 50 and 99 Auto Spins. Auto Play will begin and keep spinning the reels until all spins have been played through. Auto Play will also end if the Free Games Bonus has been triggered. You can stop Auto Play at any time by selecting the Stop button, which will appear in place of the Auto Play button.
  • All winning combinations and their values are displayed in the Paytable, which can be accessed by selecting the Info button from the bottom left-hand corner of the screen. For a Line Win (matching symbols on a payline) multiply the figure displayed in the Payatable by the Line Bet. For a Scatter Win multiply the figure in the Paytable by the Total Bet.
  • Only the highest win is paid on each individual payline. Multiple wins – on separate paylines – can occur; these are added together and paid as a Total Win.
  • The Win Box will display the total accumulative win for each spin, including that of the Collapsing Reels feature. After each win in Collapsing Reels a Current Screen Win will be displayed above the Lines Box on the lower left of the screen. The winnings are paid into your balance after Collapsing Reels has finished.

Info Page:

You can access the Hot Gem informational pages, including the Paytable, by selecting the Info button from the bottom left-hand corner of the screen. You can move through the different Info Pages by using the arrows on the bottom right of the screen. To exit and return to the reels press the Back button. The Info Pages are:

Paytable – displays information on the winning symbol combinations and their values, as well as basic information on the Free Games Bonus. Select the Show Paylines button on the bottom of the screen to load a graphic of the different paylines as they appear on the reels.

Collapsing Reels – this page displays information on the Collapsing Reels feature, explain how it is awarded etc.

Free Games – explains the rules around the Free Games Bonus.


Paylines are the pathways that matching symbols must follow across the reels (from left to right) to award a Line Win. There are 25 paylines in Hot Gems.

Please be aware that there is a marked difference between the Line Bet and the Total Bet. The Line Bet is the amount wagered on each individual payline, whereas the Total Bet is the accumulative amount wagered on all paylines, i.e. Line Bet x 25.

About Payouts:

All the payouts for Hot Gems slot are displayed in the Paytable. For a Line Win multiply the figure displayed in the Paytable by the Line Bet. For a Scatter Win, multiply by the Total Bet.

Only the highest win is paid on each individual payline. Multiple wins can occur on different paylines, these are added together and paid as a Total Win.

All Line Wins must occur on one of the 25 active paylines. These must work from left to right in an unbroken chain beginning on reel 1.

Scatter Symbols do not need to be on a payline, these will be discussed in greater detail below.

Collapsing Reels:

The Collapsing Reels feature in the base game means that you can have multiple wins in a single spin. After any spin any winning combinations – both Line Wins and Scatter Wins – will ‘explode’ with new symbols falling to the reels to take their place. The process can be repeated again and again and only ends when no new wins have been achieved. Collapsing Reels is active in the Free Games Bonus as well.

Wild Symbol:

The Wild Symbol can substitute for all other symbols – except Bonus and Scatter Symbols – to help form winning combinations. The Wild Symbol appears on reels 2, 3 and 4 only.

Scatter Symbol:

The Scatter Symbol – represented by the Hot Gems Logo – does not need to land on any payline to be considered active. If you land two or more Scatter Symbols anywhere on the reels you will win a cash amount. This is calculated by multiplying the corresponding figure in the Paytable by the Total Bet.

Free Games Symbol:

The Free Games Symbol appears on reels 1 3, and 5 only. It does not have a cash value, instead when you land 3 Free Games Symbols you will be awarded the Free Games Bonus.

Free Games Bonus:

When you land 3 Free Games Symbols in a spin, or during Collapsing Reels, the Free Games Bonus will be launched. When this occurs:

  • You will be prompted to select Start Free Games.
  • You will then be informed that you have won 15 Free Games with Collapsing Reels Multiplier.
  • The Free Games will begin to spin. The total remaining Free Games is displayed on the top centre of the screen. The accumulative amount won in Free Games is displayed on the top right of the screen.
  • Collapsing Reels is active during Free Games. However, each time a new winning combination is formed in Collapsing Reels the Win Multiplier will increase. The level of Win Multiplier is displayed on the top left of the screen. The Win Multiplier for Free Games begins with x1 and increases by +1 for each win during Collapsing Reels. When no new wins have been achieved the Multiplier will reset to x1.
  • The Free Games Bonus will end when all 15 spins have been played through. At the end of Free Spins your Total Win from the Bonus will be displayed, alongside any wins that occurred with the triggering spin.
  • The Line Bet for Free Games is the same as the triggering spin in the base game. This cannot be adjusted.
  • Click Continue at the end of Free Games to return to the reels.

Please Note: If the Free Games Bonus has been triggered whilst in Auto Play mode the game will wait for you to act before starting the Bonus. Press Click to Start to begin the Free Games Bonus. When the Bonus has ended, click Continue and Auto Play will resume once more.


Info – Open the reference screen that describes the different game components.

Auto Play / Stop – Spin the reels a number of times in succession or until the Free Games round is triggered. / End the active Auto Play reelspin mode.

Line Bet + and –                Increase or decrease the bet per line.

Spin / Skip – Spin the reels. / Skip the win animation and allow the reels to collapse. In the active Auto Play mode skips the win animation and allows the reels to collapse.

Casino Toolbar

The lower edge of the game window holds the casino toolbar, where you will find:  

Current balance – this is your account balance, the money you can use to play casino games.

Cashier – this button opens the Cashier window, where you can make deposits and withdrawals, see your transaction history, and more.

Play for Real Money – this button appears only when you are in Fun or Offline Mode. Clicking it will take you to the Real Money account creation page. If you have a Real Money account already, it will take you to the Play for Real Money login screen.

Menu – Some popular functions are united under the Menu.

  • Clicking History (unavailable in Offline mode) will open the game history window, where you can see the details of recent game rounds.
  • Options opens the options dialog, where you can change various gameplay settings.
  • Help opens the help article that you are reading right now.
  • Online Support lets you contact a customer support specialist, if one is online.
  • Close shuts the game window and takes you back to the Lobby.

Note on disconnections: If you are disconnected from the Internet while  in the middle of the main game, you will ned to login again. Then you will be automatically directed back to the game you were playing.  Clicking History will let you see the outcome of your previous round.

Note on malfunctions: A malfunction cancels all stakes and activities.

Note on large wins: Winning amounts of $10,000 or more are considered large wins. Large wins need to be verified by a live operator.

How to play casino games

Here's a rundown of some of our most popular online casino games, including how to play them, and which offers the highest payouts.

Online slots

Online slots are played more than any other online casino games. They’re relatively simple to play, which makes them a great option for beginners. Slots can also offer large payouts, particularly for a jackpot win.

Playing slots online is very straightforward. The simplest form of online slots are three-reel slots, which are based on the traditional fruit machines you may have seen in arcades. In these slots, you’ll see three columns and three rows of symbols, with the middle row being the payline. You place your bet and spin the reel, and if you get a winning combination, you win the amount stated on the paytable.

There are many other kinds of slots online available at William Hill Canada, such as five-reel slots and video slots, but they essentially work in the same way. While the odds of winning at slots are slimmer than other online casino games, they do allow you to play with small stakes on a wide variety of slots. Slots with a jackpot offer a larger prize pool, so let’s have a look at those next.

Jackpot slots

The main difference between regular online slots and jackpot slots is that the former have a lower maximum payout. With jackpot slots, however, there are larger top prizes, sometimes offering up to a seven-digit win on just a single spin.

While 'jackpot' can refer to a fixed huge cash prize awarded during jackpot games, the term is also used to describe progressive slot games. For fixed jackpot slots the size of the jackpot is, well, a fixed amount. With a progressive slot, the size of the jackpot increases each time a player places a bet on the game. Progressive jackpot slots are a great way to add to your online gambling experience. These games can offer some of the most exciting experiences of all casino games, as they provide you with the chance to win the biggest payouts you'll find online.

Online roulette

Online roulette games consist of a wheel with spaces that are either red or black and are numbered from 1-36. This popular game is easy to learn and even easier to play. All you need to do is predict where the ball will land and place your bet. The roulette wheel then spins, and if it lands on where you placed your bet, you win.

You may think that only one variant of roulette exists in online casinos, as this is typically the case at real-world casinos. However, at William Hill Canada, you’ll find multiple variants available, including a European version with one zero, and an American version with two. You’ll also find a French version that offers slightly improved odds if you bet on an even-money proposition.

Online blackjack

To win at online blackjack, you need a higher number than the dealer without exceeding 21. You are dealt two cards and can ask for another card as many times as you want before you reach 21.

One of the great things about playing online blackjack is the number of variants available. At a real-world casino, you’re restricted to just one or two games, but you'll find more here at William Hill Canada, including Blackjack Scratch, Royale Blackjack, and Blackjack Super 21.

Live casino games online

This is where online casino technology really comes into its own. Some players enjoy the thrills provided by a real-life casino but also enjoy the convenience of playing online. Live casino offers the ultimate experience to these players. The only difference between playing live casino at home and playing at a land-based casino is that with the former, the action is live-streamed to your device.

You’ll be playing at real tables, with real cards, and with real croupiers dealing your cards or spinning the wheel. Depending on the game, you'll also be playing with other players from all over the globe. With the ability to enjoy live chat with both players and the dealer, live casino offers a fantastic opportunity to enjoy an immersive experience while playing your favourite casino games online.

Enjoy free online casino games with casino bonuses

An online casino bonus is a great way to boost your balance with extra funds and make playing your favourite online slots even more fun. Casino bonuses come in a number of different forms and are applicable to a variety of online casino games.

Almost all casinos bonuses are subject to their own terms and conditions, but what you get back is certainly worth it. If you look at our current bonuses, you’ll see our welcome offer, along with any other offers we may have available. There isn’t a one-size-fits-all bonus, so just make sure to keep your eye on our bonus page in order to enjoy our selection of games the fullest.