Das xBoot 2wei! is an online slot developed by Nolimit City and the sequel to the studio's 2021 submarine hit. Released on 16 December 2025, it sends players back below the surface of the North Atlantic during the Second World War, where a weathered crew has been submerged for years, clearing mines, dodging patrols and hunting destroyers. The presentation is grim and claustrophobic in the best Nolimit tradition: a rusted hull lit by a blood-red sky, a stern bearded captain in a fur-collared coat clutching his binoculars, and the scrawled red "Zwei" slashed across the title. Sonar pings, groaning metal and muffled explosions make up the soundtrack, and the whole package feels heavier and tenser than its predecessor.
The game is played across 6 reels with a 2-3-4-4-3-2 shape, giving 576 ways to win at the start of a spin. That layout can change quickly, because the slot's features expand reels and split symbols as they land. Nolimit has kept the familiar xNudge, xWays and xBomb mechanics from the original and added new systems built around a periscope and a torpedo tube, along with three tiers of bonus spins and several paid boosters. Those details are covered in the next section, but anyone who has played the first game will recognise the core while noticing how much busier the sequel is.
This slot is aimed squarely at experienced players who enjoy dense, layered mechanics and are comfortable with extreme swings. Fans of the original Das xBoot, and of Nolimit's darker catalogue in general, will appreciate the attention to theme, where every feature is tied to the submarine rather than bolted on as a pop-up. Casual players may want to learn it in demo mode first. The following sections break down how the features work together and what the maths model means for real sessions.
Spins start on a 2-3-4-4-3-2 grid with 576 ways. xNudge Wilds are four rows tall and land only on reels 3 and 4; they always nudge until fully visible, and each nudge adds one to a win multiplier. xWays symbols on reels 2 and 5 split into two or three copies of a random regular symbol, instantly multiplying the ways. xBomb Wilds substitute and explode, clearing non-winning symbols so new ones cascade in, while adding +1 to the win multiplier before each collapse. All these multipliers add together before a win is paid, which is where the bigger hits come from.
Two newer systems sit on top. Periscope Up! can trigger randomly in the base game, growing reel 3 to eight positions and introducing a Periscope Wild. If a torpedo launched from the periscope hits its target, the wild grows to the top of the reel and nudges down, adding a multiplier for every step. The Torpedo Builder is triggered by a full boat appearing in the binocular window above reels 5 and 6; for three spins, torpedo parts land on reels 2 to 5 and add +1, +2 or +3 xWays sizes before launch. A golden boat starts a Golden Torpedo Builder where parts are worth +8 or +88.
Three bonus symbols award 8 Silent Hunter Spins with Periscope Up! always active, four give 9 Wolf Pack Spins with a persistent Torpedo Tube, and five unlock 10 Battle of the Atlantic Spins combining both. In every mode, xBomb multipliers persist and extra scatters add +2 spins. Four Nolimit Boosters, from 1.5x to 4,500x the bet, buy guaranteed triggers.
Das xBoot 2wei! carries an RTP of 95.94%, a touch under the 96% figure players often use as a benchmark. Nolimit rates the volatility as extreme, and the design makes that obvious. Ordinary base game spins on a small 576-ways grid return little, while the real value is locked inside features that need several things to line up: a nudge that keeps climbing, an xWays split that multiplies the ways, an xBomb that adds to the multiplier, or a torpedo that hits its mark.
The ceiling reflects that risk. The maximum win is 59,999x the base bet, higher than the 55,200x of the original game, and the round ends automatically when the cap is reached. Getting anywhere near it usually requires one of the higher bonus tiers, where persistent xBomb multipliers stack throughout the round and Periscope Wilds or launched torpedoes turn whole reels into wilds. There is no jackpot, so every big result is generated by the slot's own mechanics.
In practice, sessions are long stretches of small or empty spins broken by occasional explosive moments. Long runs without a bonus are normal, and even a triggered feature can finish below its cost when multipliers fail to build. The Extra Spin offer at the end of a bonus, available only when its price is covered by the round's winnings, adds a final gamble for those willing to push further. The boosters let players choose how much to pay for guaranteed action, from a cheap bonus symbol to the very expensive Golden Torpedo. This is a slot for players who know the Nolimit style and accept high risk in exchange for huge upside.
Based on reviews
Bought into Wolf Pack Spins a few times and on the third try the torpedo launched with xWays on every reel and the xBomb multiplier at x9. Ended at just over 2,100x. Brutal volatility, but that is what you sign up for with this one.
The atmosphere is fantastic, the captain, the red sky and the sonar sounds pull you right into it. On mobile everything runs fine, although the screen gets very busy when the periscope goes up.
Silent Hunter Spins with the persistent periscope multiplier are my favourite, and getting +2 spins from extra scatters keeps them alive longer. The Torpedo Builder in the base game is a great addition compared to the first xBoot.
RTP of 95.94% is a little lower than I like, and long sessions confirm the extreme rating. Still, the 576 ways and the way xWays expand the grid make it one of the more interesting Nolimit releases.
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