01/06/2026
Guess Your Bonus is here at Rainbow Casino.
Trigger a bonus feature on an eligible slot during promo times, then guess how much your bonus will pay out before the amount is revealed.
Guess within the winning range and you’ll win a slots playable voucher. Guess it spot on and you’ll get an extra voucher on top.
Running Fridays, Saturdays and Sundays from 5th–28th June, between 6pm–8pm and 10pm–midnight.
Please ask a slots host before starting your bonus feature so your guess can be recorded.
Full details: https://rainbowcasino.co.uk/our-casinos/birmingham/latest-news-and-promotions/guess-your-bonus
T&Cs apply. Eligible games only. Over 18s only. Please gamble responsibly.