Microgaming’s progressive jackpot slots series, Mega Moolah holds the record for the biggest-ever online casino prize. One lucky player scooped a jackpot of over $15 million on a $0.20 bet back in 2015.
Some other big-money games with progressive jackpots include NetEnt’s Hall of Gods, Playtech’s Life of Brian and RTG’s Aztec Millions. All of these have offered $3 million-plus prizes in the past.