Start your Big Thunder Slots adventure by spinning the Bonus Wheel 3 times today and claim your welcome bonus worth up to £6,, read more for full T&Cs. R. The casino will also offer one free spin on. . 1st, 2nd and 3rd ever deposit: win a Matchup Bonus. #Ad, 18+, BeGambleAware | New Players only. Up to £ Visit Casino. Big Thunder Slots Casino: % up to £, 1st Deposit Bonus · Type Welcome Bonus · Bonus Value £ · Minimum Deposit £10 · W. 65x(d+b) · Cashable Yes. New Players only. 1st, 2nd and 3rd ever deposit: win a Matchup Bonus up to 10X your deposit amount (£2, max bonus),£10 min fund for all 3 offers, max bonus conversion equal. All new players can receive an attractive package of Free Spins bonus to start their Big Thunder Slots journey. Up to £ + Free Spins. 1st, 2nd and 3rd ever deposit: win a Matchup Bonus up to 10X your. 1st, 2nd and 3rd ever deposit: spin multiplier wheel and win a. Big Thunder Slots Welcome Bonus. Get Your Big Thunder Slots Casino Bonus* *Up to £ Bonus Package: New Players only. 1st, 2nd and 3rd ever deposit: win a Matchup Bonus up to 10X your deposit amount (£2, max bonus), £10 min fund for all 3 offers. Category: Free Spins For Existing. Join us for Happy Hours at Big Thunder Slots every Wednesday between pm and you can win 10 free spins, no deposit required! All Available & New Big Thunder Slots Casino Bonuses ; Big Thunder Slots Casino. Big Thunder Slots Casino: Up to £ Welcome Package on Multiplier Wheel New Players only.