Special Symbols and Features
Prize Ladder and Symbols
This game features only one reel on which it is possible for 3 types of symbol to land – the Green Crystal, Red Crystal and Golden Shield. The game also features a 20-step, ladder-style paytable. The aim of the game is to climb as high as possible up the paytable by collecting Green Crystals.
Green Crystal
Each Green Crystal that lands will allow you to climb one step up the paytable ladder. You can choose to Continue, Take Half or Collect after a Green Crystal has landed.
Continue – stay in the game and continue to play with 100% of your potential winnings.
Take Half – cash out 50% of your potential winnings and continue to play the game round with the remaining 50%. Halving is only available if your currently accumulated win amount is equal to or above 1.0 of the currency in which you are playing.
Collect – cash out all of your winnings and end the current game round.
The more Green Crystals that land, the greater your chances of landing a Red Crystal.
The chances of landing either a Green Crystal or a Red Crystal are shown as percentages above the reel. The displayed chance for a Green Crystal also applies to a Golden Shield. The percentages are rounded to 1 decimal place.
Red Crystal
If you do not have an active Golden Shield when a Red Crystal lands, the current game round ends, you lose all your stacked win amount that has not been cashed out and you start from the bottom of the prize ladder.
If you have a Golden Shield active, landing a Red Crystal will break the shield and increase the next prizes on the ladder. You can then again choose to Continue, Take Half or Collect from the level reached.
Golden Shield
Landing the Golden Shield will activate a shield to protect you from a Red Crystal. The Golden Shield will start automatic spins, where no decisions will be made after Green Crystals land as you have protection and cannot lose the prize. After the Golden Shield is broken by landing a Red Crystal, the automatic spins stop and you can again choose how to proceed.
Prize Ladder Levels and Prizes
The prizes on the ladder represent stake multipliers. Landing a Red Crystal the first time after an activation of a Golden Shield during a game round upgrades you to Advanced multipliers, and these increases are applied to all yet to be achieved levels on the ladder. The levels on the ladder and their corresponding prizes on the paytable are:
Level 1 – 1.1x; Advanced – 1.1x
Level 2 – 1.46x; Advanced – 1.52x
Level 3 – 1.82x; Advanced – 2x
Level 4 – 2.46x; Advanced – 2.8x
Level 5 – 3.28x; Advanced – 3.64x
Level 6 – 4.56x; Advanced – 5.1x
Level 7 – 6.46x; Advanced – 7.28x
Level 8 – 9.1x; Advanced – 9.56x
Level 9 – 13.7x; Advanced – 14.56x
Level 10 – 19.56x; Advanced – 21.84x
Level 11 – 30x; Advanced – 32.8x
Level 12 – 49x; Advanced – 56.4x
Level 13 – 86x; Advanced – 96x
Level 14 – 146x; Advanced – 159x
Level 15 – 282x; Advanced – 327x
Level 16 – 500x; Advanced – 690x
Level 17 – 1,100x; Advanced – 1,364x
Level 18 – 2,640x; Advanced – 3,640x
Level 19 – 6,185x; Advanced – 10,000x
Level 20 – 18,000x; Advanced – 48,000x
Some values on the prize ladder might be shown rounded down to the second decimal place in case a result based on the current stake would yield a value with 3 or more decimal places.
When halving, if the result would yield a value with 3 or more decimal places the game will follow the round half up strategy.
For example: The number 0.676 will result in 0.68. The number 0.674 will result in 0.67.
If the value is exactly halfway, it will be rounded up.
For example: 0.675 can result in 0.68.
Best Gamble Strategy
In order to define the Best Gamble Strategy for this game, we need to break a game round into 3 possible scenarios:
1. You have not landed a Golden Shield:
If you have not landed a Golden Shield, the best strategy is to cash out after landing 9 Green Crystals.
If you decide not to adhere to the Best Gamble Strategy and choose to Continue after the 9th Green Crystal then it is best to keep on choosing to Continue and then Collect after the 12th Green Crystal has landed. If after the 12th Green Crystal you again decide to “Continue”, then the Best Gamble Strategy after each next Green Crystal up until the end is to “Collect”.
2. You have already landed a Golden Shield and it has just been broken:
Choosing whether to Collect or Continue immediately after the deactivation of a Golden Shield depends on how many Green Crystals are left in play, which is indicated above the reel:
19 Green Crystals – Continue.
18 Green Crystals – Collect.
17 Green Crystals – Continue.
16 Green Crystals – Continue.
15 Green Crystals – Continue.
14 Green Crystals – Continue.
13 Green Crystals – Collect.
12 Green Crystals – Continue.
11 Green Crystals – Collect.
10 Green Crystals – Collect.
9 Green Crystals – Continue.
8 Green Crystals – Continue.
7 Green Crystals – Collect.
6 Green Crystals – Continue.
5 Green Crystals – Continue.
4 Green Crystals – Collect.
3 Green Crystals – Collect.
2 Green Crystals – Collect.
1 Green Crystal – Collect.
3. You have landed the Golden Shield and after it was broken you have chosen to Continue and have landed a Green Crystal:
The best strategy requires you to Collect after a maximum of one Continue choice that has resulted in a Green Crystal after breaking the Golden Shield.
The RTP is shown in-game and is only achievable by playing with the Best Gamble Strategy.
Please note that no strategy can result in a win, as this game is random, using a Random Number Generator.
Bonus Auto-Complete
If the player loses connection to the game, closes the game or restarts the game before making a choice, the current game round will auto-complete by following the Best Gamble Strategy as described above.
How to Play Astronaut
Game Progress
Any progress features in the game, including symbols locked onto the reels which affect subsequent spins, are saved for your game at the stake level you are playing at.
You can have different progress levels at different stakes on the same game, and move between them by changing the stake.
If you are awarded free spins from a promotional campaign any progress in the main game including any locked symbols, will be saved and be available to continue playing at the same stake once the free spins have been completed.
Please note that this stateful game saves its state forever.
Total Stake
The Total Stake is the total of stakes per line. You can adjust it at any time, using the + or – buttons.
Spin the Reels
If you are playing on desktop, click the Spin button or press the spacebar to spin.
Gaming Session Information
“Gaming session” is considered the time since the current game has been opened, until the time it is closed. Opening the game again from the lobby, or reloading the game in the browser is considered a new gaming session.
“Session timer” is measured for the current gaming session only.
“Net position” is based on the current gaming session only, calculating “all real money wins minus all real money bets.”
For the best gaming experience, use of the latest version of software is recommended.
Malfunction voids all pays and plays.
The RTP is shown in-game.
The calculated max potential multiplier of the game is 48000.
Minimum stake: £0.10
Maximum stake: £5.00
Astronaut Free Play Explained
A Astronaut free play or demo mode is often used by players to learn how a slot works before wagering. Since this option isn’t available on our site, we provide the essential information straight from the game instead. By reviewing these details, you’ll understand how Astronaut operates without needing to access a demo. This page gives you a straightforward breakdown of its main features as an alternative to free play.
