Das xBoot slot review

Das xBoot slot: a submarine on a diamond-shaped grid

Das xBoot is one of the many Nolimit City games built around the studio’s “x” mechanics. The naval theme runs right through it: Silent Hunter and Wolf Pack bonus rounds, Periscope Wilds and a torpedo that collects symbols.

The grid is unusual. Instead of a rectangle, the six reels show 2, 3, 4, 4, 3 and 2 symbols, making a diamond shape that is tallest in the middle. The Silent Hunter bonus round makes the most of that shape by enlarging the middle reel.

How the features work in Das xBoot

xNudge Wilds

These wilds are four symbols tall. When one lands only partly in view, it nudges into position, and each nudge adds 1 to its multiplier. A wild that has to move a long way therefore ends up worth more when it completes a win.

xBomb Wilds

xBomb Wilds act as wilds and also explode. The explosion clears symbols from the grid so that new ones can fall in, giving the spin another chance to form wins at no extra cost.

xWays symbols

An xWays symbol opens to reveal several copies of one symbol in its position. That makes its reel count as taller for the spin, which raises the number of ways to win.

Silent Hunter Spins (three scatters)

Three scatters start Silent Hunter Spins. Here, the middle reel is enlarged and Periscope Wilds appear on it. They expand and nudge, and like xNudge Wilds they build their multiplier as they move.

Wolf Pack Spins (four scatters)

Four scatters start Wolf Pack Spins instead. In this round, a torpedo collects xWays symbols along with their multipliers, adding them together.

Das xBoot ways to win: 576 and beyond

Ways are counted by multiplying the number of symbols on each reel. For the base grid, that’s 2 × 3 × 4 × 4 × 3 × 2 = 576. Every time an xWays symbol adds height to a reel, the product grows.

The examples are illustrations of the multiplication, not what xWays actually reveal; the game’s rules set the possible sizes. Ways are only potential: a win still needs matching symbols on neighbouring reels from the left. Our megaways and ways guide explains ways games in more depth.

Silent Hunter Spins vs Wolf Pack Spins

The two rounds reward different numbers of scatters and work in different ways. The table sets them side by side using only the verified details.

Neither round can be bought in the UK. Since a Gambling Commission warning in January 2020, feature buy-ins are not offered to British players.

Extreme volatility: a £20 Das xBoot session

The default RTP of 96.03% leaves a house edge of 3.97%, so £20 of stakes costs about £0.79 on average. On an extreme game, though, the average hides a very wide spread: much of the return is concentrated in rare bonus rounds with high multipliers.

For a short session that usually means one of two things: the £20 runs out with little coming back, or a bonus round lands and decides the session on its own. Results between those extremes are less common than in steadier games.

Low stakes make the most sense here, because they give the scatters far more chances within the same budget. If you want a reminder of time and spend while you play, turn on reality checks in your account.

Playing Das xBoot on iPhone and Android

Nolimit City builds its games in HTML5, so Das xBoot opens inside UK casino apps and mobile browsers. The diamond-shaped grid leaves more empty space than a full rectangle, but xNudge multipliers and xWays reveals are small details on a phone, so a larger screen helps. The app decides whether the game opens in portrait or landscape.

1. Choose a UK-licensed casino app and install it from the App Store or Google Play. Our guide on whether casino apps are safe lists what to check.
2. Complete the age and identity checks required before you can deposit or play.
3. Choose a deposit limit when the app asks, before any money goes in.
4. Search the lobby for “xBoot”. If it isn’t listed, the casino doesn’t offer it.
5. Open the game’s rules screen, check the RTP and read how many spins each bonus round gives.
6. Pick a small stake and start each spin by hand, keeping an eye on the net spend display.

UK rules on Das xBoot

Since 31 October 2021, a few weeks after this game came out, British online slots have run under the design rules described in the Gambling Commission’s online games design consultation response (opens in a new tab):

• no autoplay, so each spin starts with a tap;
• at least 2.5 seconds per spin, with no turbo or slam-stop;
• no celebrating returns equal to or below the stake.

Stake limits arrived in 2025: £5 a spin for players aged 25 and over from 9 April, and £2 for those aged 18 to 24 from 21 May. At £2 the 55,200x cap would be £110,400; at £5, £276,000. The Commission’s games warning (opens in a new tab) of January 2020 is the reason British players don’t see a buy option. Our UK rules section has the details.

Nolimit City, the studio behind Das xBoot

Nolimit City was co-founded by Jonas Tegman, has its registered office in St Julian’s, Malta, and has teams in Sweden, Malta and India. In June 2022, Evolution announced a deal to buy it for up to €340m, of which €200m was upfront and up to €140m in earn-outs.

The studio is known for Mental, San Quentin and Tombstone, and for its family of x mechanics: xWays, xNudge, xSplit and xBomb. Das xBoot uses three of those four.

Is the Das xBoot slot for you?

It suits players who already know how extreme slots behave and who use a fixed budget at a low stake. If that sounds uncomfortable, a lower-volatility game from our slots hub is a better fit.

Where to play Das xBoot in the UK

Nolimit City games aren’t in every UK app, so check the lobby before you register. The welcome offers below are 18+, for new customers, with terms applying; the spins are for slots each casino selects.

• PlayOJO: 80 free spins on Big Bass Bonanza, worth 10p each, on a first deposit of £10 or more. No wagering, so spin winnings are cash. New UK customers outside Northern Ireland, through the designated offer link, and it can’t be combined with other offers.
• Coral: make a qualifying deposit (certain types don’t count) and bet £10 or more on slots for 100 free spins at 10p each on selected games. Accept within 48 hours; the spins last 7 days and their winnings have no wagering. Open from 1 October 2026 until 1 February 2027.
• Ladbrokes: deposit and spend £10 or more on slots, then claim 50 free spins each day for 10 days (500 at most), at 10p each on selected games. Claim before 23:59 daily; the spins are valid for 7 days, and there’s no wagering.

Coral and Ladbrokes are both LC International Limited brands, so you may be able to join only one as a new customer. Neither offer accepts deposits by PayPal, Neteller, Skrill, Paysafe or prepaid card. Our best slot apps list compares the apps.

18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.