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Relax Gaming launches new slot Nuclear Tumble

By Emma Bergqvist · Published 29 October 2026

Relax Gaming has released a new slot in its popular Tumble series. The game is called Nuclear Tumble and was built together with the community platform Casino Grounds. Relax Gaming released Nuclear Tumble, a new slot developed with Casino Grounds, on 29 October 2026. It blends cascading gameplay with cash-prize symbols in a post-apocalyptic setting.

What’s new

Nuclear Tumble is set on a radiation-ravaged farm. The name refers to one of nature’s most powerful forces, with a strong emphasis on cash symbols and collecting them. The grid runs on six reels with up to 46,656 ways to win, and stakes starting from around 20 pence per spin.

Wins break down stone blocks across the grid. Play starts around 25 stone blocks, and winning combinations destroy blocks positioned directly above, below, left or right of them, revealing cash symbols, bombs and scatters. Bombs destroy other non-cash prizes across their row and column, while cash symbols are collected once they reach the bottom of the grid and also destroy blocks beneath them. If the grid is cleared of blocks, a bonus round kicks in. All symbols except cash prizes are then cleared and a new tumble occurs, with better odds of more and bigger cash values.

The free spins round can also grow as play continues. It starts with six free spins, though landing certain symbols can improve the starting position, and collecting four cash symbols during the round increases their value while awarding extra spins. At the highest level, gold cash symbols can be worth up to 2,500 times the stake, and the game carries a top RTP of 96.1% with a maximum win of 5,000 times the stake. Several bet modes are also built in. According to Relax Gaming, the game is built around simple cash-win mechanics and bet options, plus the chance to wager Free Spins to unlock better options.

What it means for you as a player

Nuclear Tumble is reaching Swedish casinos because Relax Gaming is authorised to operate in Sweden. The studio holds a gaming licence from Spelinspektionen and is therefore entitled to offer its games to Swedish casinos. That means you can try the slot at a licensed casino with slots while keeping the safeguards that come with a Swedish licence, such as deposit limits and session timers.

The numbers also tell you what to expect. An RTP of 96.1% and medium volatility mean the game is neither extremely generous nor extremely swingy. A stake range from small amounts up to roughly SEK 200 per spin keeps it accessible on most budgets. Remember that support is always available through Stödlinjen and Spelpaus if gambling starts to feel hard to control.

The bigger picture

Nuclear Tumble is another addition to Relax Gaming’s wide Tumble catalogue, which already includes titles such as Money Train and Temple Tumble. The studio has operated in the Swedish market since 2023, when it was granted its B2B licence by Spelinspektionen. Relax Gaming is headquartered across Malta, Estonia, Sweden and Serbia. The Nuclear Tumble launch shows the studio continuing to develop its most popular mechanic, while staying within its Swedish licence and its obligations to Swedish players.