Das xBoot Zwei
Game Studio Nolimit City
Release date 16 Dec 2025
RTP 92.03% - 95.94%
RTP Feature Buy 96.07%
Paylines 576+
Volatility High
Min Bet 0.20
Max Bet 100
Max. Win 59,999x
Rating 9.5/10
The torpedoes are loaded, the bombs are locked in…open the hatches…FIRE!!…
“Nein Nein Nein”…missed.
Heads may be in hands as the result of a perfect-looking setup going to waste, but such is the edge-of-seat, volatile excitement of Nolimit City’s notorious “Das xBoot“, which follows the journey of an ominous, German U-Boat as it strives for oceanic supremacy.
Packed full of classic “x” features from xWays and xBombs to those potent xNudge Wilds, players have long shared a love/hate relationship with, arguably, one of the studio’s most popular titles, and it’s really not surprising why, with the game offering up truly pulse-raising, dynamic gameplay, with 2 Free Spins bonus rounds each able to progress into something so huge that it makes the real battle of the seas look like a mere splash in the bath tub.

Das xBoot Zwei Base Game Play
Since the release of Das x the first (or eins to keep in theme), nothing else from the provider has really taken to a similar format, perhaps not counting “Stockholm Syndrome” which never really captured its audience in the same way, but as anticipation levels begin to rise, it’s finally time to up the periscope, once again, as “Das xBoot Zwei” launches at full power onto our casino platforms, and it’s safe to say that this one is going to bring more than choppy waters!
The 6 reel game grid takes on the row format of 2-3-4-4-3-2, able to expand further through a variety of in-game features, and overlays a foreboding, deep ocean scene as the U-Boat navigates through a labyrinth of mines scattered throughout the gloom.
A hauntingly suspenseful soundtrack fills the air, as the occasional pulse of the radar system only adds to the apprehension.
All of those traditional mechanics make their return, however with a more in-depth range of features, including both a Torpedo and Golden Torpedo Builder in base game mode and Free Spins, and an additional Bonus game that sees the combination of Silent Hunter and Wolf Pack Spins making the cut, it’s safe to say that this is one Sub you don’t want locking on to your Destroyer!
With increased additions also comes an increased max win potential, up from 55,200x bet of its predecessor, to 59,999x bet, and with a highly volatile math model running the engine alongside an RTP of 95.94%, the action should rarely allow for respite.
It’s time to climb aboard, as we check out all of the key features and rules in more detail…

Das xBoot Zwei Offers Players 576 Ways to Win
Das xBoot Zwei Base Game and Features
Win spins are formed by combining 3 or more matching symbols from left to right, across adjacent reels, over any of the game’s 576 initial win ways.
10 regular paying symbols make up the selection, consisting of low-paying Royals worth up to 0.9x bet for 6 matching symbols across, and 5 high-paying characters paying between 1x to 5x bet for 6 matching symbols.
Wild symbols are also included and substitute for any regular paying symbol.
xNudge Wild, xWays and xBomb
xNudge Wild symbols are 4 row-high symbols that may only land on reels 3 and 4, except during “Periscope Up!“, where it can only land on reel 4.
When an xNudge Wild lands partially visible on a reel, it nudges until fully visible, with each nudge increasing the Wild multiplier by +1.
When multiple xNudge Wild symbols land, all multiplier values are first added together before applying to a winning combination.
xWays symbols can land only on reels 2 and 5, revealing a random, regular paying symbol upon appearing.
The size of the xWays symbol can range between 2 to 3 symbols and, when more than one xWays symbol land at the same time, all revealed symbols shall be of the same type.
An xBomb Wild symbol lands before exploding, and removing, all pay symbols that are not involved in a winning combination.
After the explosion, remaining symbols fall to the bottom-most positions available within the reels, allowing fresh symbols to fall into the grid to fill the empty spaces.
Prior to the collapse, the Win multiplier is increased by +1, with the xBomb multiplier also carrying through to the bonus games, should one be triggered during the same spin.

Trigger the Periscope Up! Feature for Additional Wild and Multiplier Potential
Periscope Up!
During the Periscope Up! feature, reel 3 expands to 8 rows high, with an additional Periscope Wild able to land on the reel during that spin.
Landing a Periscope Wild triggers the torpedo launch sequence, whereby a target is located and a torpedo is fired.
Hitting the target sees the Periscope Wild expand to the top of the reel, before nudging down to the bottom of the reel, increasing the win multiplier by +1 with each nudge.
Missing the target sees the Periscope Wild act as a singular Wild symbol.
During both base game mode and Wolf Pack Spins, the Periscope Up! feature can trigger randomly, though remaining active throughout during Silent Hunter and Battle of the Atlantic Spins.
Periscope Wilds cannot nudge over symbols revealed from a Torpedo Launch feature.

Trigger the Torpedo Builder Feature for the Chance to Launch the Torpedo for Big Rewards
Torpedo Builder
During base game and Silent Hunter Spins, landing a full boat in the Ocular, positioned above reels 5 and 6, triggers the Torpedo Builder.
Upon triggering, a Torpedo tube appears beneath reels 2 to 5, and only Torpedo parts may land on these reels.
3 Spins are awarded to construct the 4 Torpedo parts.
Reels 2 and 5 may drop +1, 2 or 3 xWays symbols, with reels 3 and 4 dropping +1, 2 or 3 xWays Wild symbols, each activating once the Torpedo is launched.
Completely filling the Torpedo reel launches the Torpedo, with all xWays symbols revealing in the size of the collected parts.
Reels 2 and 5 symbols are transformed into the same instance of a random pay symbol, split in the collected number of ways.
Reels 3 and 4 symbols are transformed into Wild symbols, split in the collected number of ways.
Golden Torpedo Builder
Landing a Golden boat within the Ocular triggers Golden Torpedo Builder.
Playing to the same rules and mechanics as the regular feature, additionally, Torpedo parts only land with a value of +8 or +88.

Land 3 or More Scatters to Trigger the Free Spins Bonus Games
Das xBoot Zwei Free Spins
3 Free Spins bonus rounds are included during game play, Silent Hunter, Wolf Pack and Battle of the Atlantic Spins, each triggered by landing 3, 4 and 5 scatters, respectively, during the same round and awarding 8, 9 and 10 spins, respectively.
In all 3 bonus modes, landing an additional scatter symbol awards 2 extra spins.
Silent Hunter Spins
The Periscope Up! feature remains active throughout the entire round.
Additionally, the Periscope Wild nudge awards a persistent multiplier, beginning at 1x after the first nudge, before growing by +1 for each nudge thereafter.
The multiplier applies only to the spin in which the Periscope Wild lands, and the target is hit.
Whenever an xBomb Wild lands, an xBomb multiplier is awarded, increasing the multiplier by +1 for the remainder of the bonus round.
All multiplier values are first added together before applying to a winning combination.
Wolf Pack Spins
The round begins with a Torpedo Tupe appearing underneath reels 2 to 5, with Torpedo parts now able to land on the reels and add to the Tube.
The Torpedo Tube begins pre-filled with xWays and xWays Wilds of the size of 2, with all additional parts, landing on the reels, detaching and leaving behind Wild symbols in their place.
Reel 2 and 5 may drop +1, 2 or 3 xWays symbols, with reels 3 and 4 dropping +1, 2 or 3 xWays Wild symbols, each activating once the Torpedo is launched.
Any time that a boat lands fully visible in the Ocular, the Torpedo launches in its current state, acting to the same mechanics as during the Torpedo Builder feature.
After the Torpedo has launched, an identical Torpedo is loaded into the Tube, which can be further enhanced during the remaining spins.
Whenever an xBomb Wild lands, an xBomb multiplier is awarded, increasing the multiplier by +1 for the remainder of the bonus round.
All multiplier values are first added together before applying to a winning combination.

Trigger Silent Hunter Spins for a Persistent Torpedo Wild Multiplier
Battle of the Atlantic Spins
This bonus round combines both the mechanics and features of Silent Hunter and Wolf Pack Spins.
Whenever an xBomb Wild lands, an xBomb multiplier is awarded, increasing the multiplier by +1 for the remainder of the bonus round.
All multiplier values are first added together before applying to a winning combination.
Extra Spin
At the end of any of the 3 bonus games, players may be offered the chance of an Extra Spin, with the cost of the spin dependent on the current state of play.
All existing multipliers are held, along with the previous progress of the Torpedo Tube, where applicable.
If the cost of the extra spin is less or equal to the current total win, an Extra Spin chance will be offered.
Nolimit Boosters and Buys
A hearty range of purchasable features can be utilised, should you wish to enhance play further…
- Bonus Booster – at the cost of 1.5x bet, each spin guarantees one scatter landing.
- Periscope Booster – at the cost of 8x bet, a spin guarantees triggering the Periscope Up! feature.
- Torpedo Booster – at the cost of 20x bet, a spin guarantees landing a full boat in the Ocular.
- Golden Torpedo Booster – at the cost of 4,500x bet, a spin guarantees landing a full golden boat in the Ocular.
Additionally, 4 bonus buy options have also been included…
- Silent Hunter – at the cost of 80x bet.
- Wolf Pack – at the cost of 250x bet.
- Battle of the Atlantic – at the cost of 750x bet.
- Lucky Draw 50/25/25 – at the cost of 290x bet.
The RTP of all feature and bonus buy options ranges between 96.02% to 96.07%.

Wolf Pack Spins Allows Players to Progressively Build the Torpedo Parts, with Battle of the Atlantic Spins Combining both Bonus Features Together
First Impression
If there is one slot studio that knows how to do slot sequels the right way, it’s Nolimit City, a team that clearly understands the importance of perfect progression and enhancing the reputation of a past classic.
Das xBoot has always been a title which takes a relatively simple concept, adds in a sizeable number of features, and ends up being a game boasting level after level of dynamic, progressive gameplay.
Whether it be the increasing ways and Wild opportunities from the Periscope Up! feature, or the gradual building of the Torpedo launch mechanic, players have long held a soft spot for the highly volatile potential that literally grows in front of their very eyes.
Even after a rough ride, the game has always had the ability to draw you back, able to ask those “what if?” questions and leading to that important longevity of play.
Surely things couldn’t get any better, right?…Wrong!
Step up Das xBoot Zwei, a title that literally has the power to blast through any thickness of floating steel, until it is nothing more than a twisted wreck at the bottom of the ocean.
Straight from the off, the all round visuals and theming have had a tasteful revamp, not straying too far from the game’s roots, yet adds an extra heap of ‘zing’ to the gaming experience on the whole.
The graphics are on point, the soundtrack is intense, and it all goes towards creating a truly immersive feel from start to finish.
Base game mode arrives with some serious bulk, as the Periscope Up! feature can randomly trigger for additional Wild and multiplying opportunities, and a huge addition being the arrival of the Ocular feature.
Landing a ship in full view, within the Ocular, triggers the Torpedo Builder feature, allowing players to construct Torpedo parts in the hope of activating a launch.
The mechanics are the same as during the original title’s Wolf Pack Spins, and the fact that this has now been implemented into standard mode of play really shows the level of the the sequel’s progression.
Perhaps the most potent addition is the inclusion of Golden Boats within the Ocular, triggering the Golden Torpedo Builder and allowing for xWays and xWays Wild values of either +8 or +88, a surefire way of nearing that huge max win potential.
So rewarding it can be, the cost of purchasing the feature outright is no less than 4,500x bet, almost GOD Mode figures, so players should not be expecting the chance to come around too often, yet should embrace it when it does!
Enter the Free Spins bonus games and, at first glance, much remains similar to past experiences, with Silent Hunter upping the Periscope and Wolf Pack constructing the Torpedo parts.
What is different, however, is the persistence of the Torpedo upon launching, returning once again in its current state for additional enhancements, and the fact that it begins already constructed with a default +2 starting value throughout.
The potential then only increases further when triggering the Battle of the Atlantic Spins, combining both bonus features into one volatile war at sea.
The potential truly is there to see, and with as much chance for reward, even during base game mode, players are certain to find themselves treading water amongst the most savage waves that crash from all around.
Das xBoot Zwei has been eagerly anticipated from the second of its announced forthcoming, and although some sequels arrive not quite reaching the heights of initial expectation, the unforgiving crew found here are more than ready for battle!
The screenshots taken of games reviewed on this site are taken from Demo Play, as reviews are often written before games are released for real play.
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