Tap once, and the session is brand new. The launcher on this page is the one Endorphina publishes for its own game, so the 3 Golden Chests demo you are about to open is the finished build: twelve reels, three chests, the Hold and Win round and a play-money balance shown in EUR. Nothing to install, nothing to register, no waiting for a session to free up.
What you see on the demo screen#
Twelve reels, one centre row, three lids. Read the screen in that order and the game explains itself before your first spin finishes.
The grid is a 4x3: four reels across, three rows down, twelve positions in total. What makes it unusual is that each of those twelve positions spins as its own reel, which is why the result reads as a picture instead of as lines resolving from the left. Above the grid sit the three chests, coloured red, green and purple, each holding special symbols of its own colour and each with its lid already cracked open.
Look at the symbols themselves next. Money symbols carry their prize printed on their own face, calculated for the stake you have selected, and those printed prizes are paid out inside the Bonus Game. That is the game’s pay table, sitting in plain sight on the reels. Change the bet and every face redraws.
Then the centre row, which is the one piece of geometry worth watching on every spin: four regular symbols landing there opens the Bonus Game. Wins otherwise come from scatter pays, so a symbol counts where it lands.
Finally the bottom bar, where AUTO and TURBO live beside the spin button. AUTO runs a series of rounds at the stake you set, TURBO shortens the animation, and both behave identically in the demo and on a real balance. Spend a few free spins with them now and the money session will feel familiar.
A short checklist for your first free minutes, in the order the screen gives them to you:
- Set a stake and leave it. The demo opens on a default step. Pick one you would actually use and stay there, because STICKY symbols only hold their place while the total bet is unchanged.
- Watch the centre row. Four regular symbols there is the whole trigger. Once you have seen it form, the game stops being a mystery.
- Read one money symbol properly. Find its printed value, then work out what it is worth at your stake. A 10x face is 1 at a 0.1 total bet and 1,000 at a 100 total bet.
- Open the RULES panel. It lists the special symbols and the four fixed tiers, which is the fastest way to see how ULTRA at 1,000x sits under the 1,400x round ceiling.
- Try AUTO once. It holds the stake constant while you watch the centre row, which is the cleanest way to learn the game’s rhythm: the published hit frequency is 2.78%, about one spin in 36, and the money is paid inside the Bonus Game.
From demo to real balance: what changes#
The game is the same; the rail is what changes. Say that plainly, because a demo only earns its place if it tells the truth about the paid version, and this one does.
The return is a property of the build. 96.04% is the theoretical figure for the game itself, and the optional card gamble sits outside it on its own 84% average. Volatility is High in both modes, which means the same patient stretches followed by the same sudden settle when a round lands. Practise reading that rhythm for free and you will recognise it immediately when your own money is on the reels.
What the casino owns is the bet rail. Some lobbies open the game at 0.01 and others take it as high as 250, because the operator and the currency decide the steps. The panel inside the game always shows the exact rail of the table you opened, so the first thing to do after switching to a real balance is glance at it once and pick your step.
Test one number deliberately while the balance is play money: the stake. Move the bet selector a step and watch every printed prize on the grid redraw. A face showing 5x is 0.05 at a 0.01 total bet, 0.5 at a 0.1 one and 500 at a 100 total bet. Two minutes of that in the demo tells you which column of the rail you actually want to sit in, which is the one decision the casino leaves entirely to you.
The ceiling is the figure that changes character between the two modes. Up to 1,400x the total bet, with the provider’s own material going as far as 1,500x, is a badge on a demo screen. On a real balance it turns into arithmetic: at a 0.1 total bet the ceiling is 140, and at a 100 total bet it is 140,000. The fixed ULTRA tier at 1,000x works out at 100 and 100,000 at those same two stakes. Our RTP and maths page lays out the whole ladder, and the where to play page covers choosing the table itself.
Learning the Bonus Game with no pressure#
Three attempts to learn for free. The Bonus Game opens when four regular symbols land in the centre row, which means the entry is earned on the reels: the price of a bonus round is the spin you were already making, at whatever stake the demo is set to. Play a stretch and you will see the trigger form.
Once the round starts, each of the three chests decides on its own whether to take part, independently of the symbols that opened the round. Watching that happen a few times for free is the fastest way to learn what each colour does.
- Red, BOOST. Its symbol hands its own prize, worth 1x, 2x, 3x, 4x, 5x, 7x or 10x the total bet, to every BONUS symbol already on the grid, then leaves. Note how much it is worth on a full board compared with an empty one.
- Green, MYSTERY. It stays face down until the attempts are done, then turns over for MAX at 100x, MID at 50x, MIN at 20x, or a regular 7x or 10x.
- Purple, COLLECT. It adds up the prizes of every BONUS symbol on the reels while those symbols keep their own money, and each COLLECT symbol fires once.
- The counter. You start with 3 attempts, and every new symbol that lands puts the counter back to the top. The round closes when the attempts run out or when all 12 positions are covered.
- The multipliers. BONUS symbols run from 1x to 5x the total bet in the main game and from 1x to 10x inside the round, which is the clearest single reason the bonus is where the money lives.
STICKY symbols are the main-game equivalent of a sticky wild: they carry 5x to
10x the total bet and hold their spot, as long as you leave the total bet alone.
Change it and they stop sticking on the next spin. That is a free lesson best
learned in the demo, and the features page
has the rest of the
detail.
Free play with nothing to lose but the time#
A demo session earns its place when it answers questions that cost money elsewhere. Four of them come up here. Whether a grid that resolves all at once suits you better than one paying left to right. Whether high volatility fits your patience, or you would rather have constant small contact. Whether the Hold and Win round, with its three attempts and its counter resetting on every new symbol, is the kind of finish you enjoy watching. And which stake feels right once you see what the printed prizes are worth at it.
None of those need a deposit to answer, and all four change how a real session goes. The launcher carries no registration step and nothing to download, so the gap between deciding to look and watching the first spin is a single tap. Play long enough to see one Bonus Game open and you will know whether the game is for you.
There is one honest limit worth stating: a play-money result predicts nothing about a cash one. The demo teaches you the rules, the rhythm and the value of a symbol at a given stake. What it cannot do is hand you an edge, because the outcome of every round in both modes comes from the same generator. Use it as a rehearsal, and set your limit before you switch balances.
Carry on from your phone#
Same screen, same game, in your pocket. The game is published for desktop, tablet and phone, it runs directly in the browser on all three, and the layout holds its shape on a small screen because a 4x3 grid has room to spare. The launcher mints a brand-new session on every tap, so opening it on a phone after a session on a laptop costs you one tap and a full play-money balance; the only thing you have to carry across is which stake you liked.
On a real balance there is a further convenience: an unfinished round is kept for 7 days, so a bonus interrupted by a train arriving is still there when you open the game again. The app page covers the partner casino’s Android and iOS app, where the same game sits in the slots lobby with the same 96.04% and the same three chests. And when you are ready to move from play money to a real rail, take one minute with the slot hub for the short version of everything above, then open a table through the button.