Silent Run
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Silent Run Slot Machine

Silent Run is a five reel and three row slot game set beneath the waves within a military submarine. The game has a theoretical return to player percentage of 96.1% and allows players to select one of ten different bet levels and one of six separate coin values. The fun gameplay also features wild substitutions, a bonus game and a number of other exciting bonus features.

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Silent Run Review

Game info

Payout %:96.1
Pay Lines:25
Max Win:125,000
Wild:Warning Light
Our Rating:3.8 / 5

The Silent Run slot game is an innovative and exciting one which boasts a number of added elements and bonus features. These will all be covered in full as part of the below review, which will explain the game’s top jackpot, special symbols, paytable and betting limits.

Top Jackpot

The most valuable combination which can be achieved across one of Silent Run’s 25 pre-set paylines is that made up of five of the submarine symbols. That combination pays out winnings worth 1000 times the current bet level, meaning that at bet level ten that equates to a jackpot of 10,000 coins per payline.

If that combination were to appear across all 25 paylines at once, therefore, this would pay a total top jackpot of 250,000 coins which is worth £125,000 at the maximum coin value of 50p.

Silent Run, too, offers another opportunity for players to win big through its bonus game. The workings of the game will be explained in detail below but its top potential jackpot is actually larger than that able to be won in the main game and stands at 256,600 coins.


The gameplay of the Silent Run slot is unique and interesting, and utilizes three separate special symbols called the Wild symbol, Echo Wild symbol and Echo Bonus symbol.

Special Symbols

Silent Run SlotWild symbol – the Wild symbol is a traditional slot wild, can substitute for all other symbols except for the Echo Wild and Echo Bonus symbols, and always goes towards making up the most valuable possible combination for any payline.

Echo Wild Symbol – silent Run’s Echo Wilds are entirely different, can only appear on reel three and work by activating the so-called Echo Wild feature. That feature sees the symbol send out three ‘sonar signals’ which randomly turn up to a maximum of 14 symbols across the reels into wilds.

Echo Bonus Symbol – echo Bonus symbols also appear only on reel three and similarly send out three ‘sonar signals’ once they have appeared. For these symbols those signals work to randomly find between two and five torpedoes, and whichever number are found, are carried into the Silent Run bonus game.

In that bonus game, players can use those torpedoes to shoot enemy ships, with each ship hit resulting in a different coin win amount. The winning amount is multiplied by a multiplier attached to each torpedo (either x1, x2, x3, x5 or x10) and that multiplier increases by one level for each hit until the torpedoes run out.

The maximum single hit win available through the bonus game is 250,000 coins and the maximum total win for one session of the game is 256,600 coins.

Regular Symbols

All of the Silent Run symbols are themed around life on a submarine and in naval battles, and the most valuable symbol of all simply displays a submarine. A five submarine symbol combination across a payline is worth 1000 times the bet level to a player, meaning that at bet level ten it can return 10,000 coins per payline.

Behind the submarine symbol, the next most lucrative one within the game is that depicting a battleship. If five of these line up along a payline, a player will receive winnings equal to 750 times their chosen bet level. For that combination, then, the top jackpot equals 7,500 coins per payline.

Betting Limits

Silent Run is always played with its 25 pre-set paylines active but players can control their betting amounts by altering both the bet level and coin value of each spin. There are six available coin values ranging from 1p to 50p and ten different bet levels from 1-10 which represent how many coins are bet per payline.

What that means is that the minimum possible stake per spin stands at just 25p and the maximum is a total of £125. That minimum is achieved by setting a bet level of one and a coin value of 1p, whilst the maximum is reached by selecting bet level ten and a coin value of 50p.

What We Think

Silent Run is an all-around excellent slot game which really does offer something for everybody. Those players who are most interested in fun and engaging gameplay will enjoy the bonus game and other special features, and those who play purely for big payouts will love the two different ways in which they could win jackpots worth £125,000.

The overall submarine theme of the game, too, is a unique one which has been applied cleverly to both the main game and its additional features. That is most notable in the case of the bonus game, which is simple and yet really fun to play and potentially very rewarding to players.

Finally, the game also excels when it comes to the control it offers to players over their wagering amounts. Both bet level and coin value can be altered for each spin and the various alternatives for each, mean that players of all budgets are well catered for.

This game has a rating of 5 / 5 with 423 total reviews by .

Author Info

Written by: Sam Jones

Sam is an author here at with her specialty firmly lying in slot and casino reviews (she does have a wealth of experience after all) - more info about our team...