Hard Rock Bet Michigan welcome bonus detailsGet the Hard Rock Bet app and explore one of the best online casinos in Michigan this week. You must be at least 21 years old to join the Hard Rock Bet online casino in Michigan. Casino Welcome bonus Promo code Hard Rock Bet Get Up To $1000 Back In Casino Bonus + 200 Bonus Spins Just tap hereGet 200 bonus spins and up to $1,000 in bonuses at Hard Rock BetWith the Hard Rock Bet welcome bonus, you will get up to $1,000 back in bonus funds with this 24-hour lossback bonus. Hard Rock Bet will return 100% of your net cash losses as a Casino Bonus, up to $1,000. How to claim the Hard Rock Bet bonus in MichiganFollow these steps to claim the Hard Rock Bet welcome bonus.