On Saturday a punter at Mr Green Casino took home a large €859,004 jackpot while playing one of the Mega Wonder compatible slots.
Details on the win have not been revealed by Mr Green or Net Entertainment, who provides the software for the progressive.
This is the largest win that this game has ever paid out, easily eclipsing the €693,266 total was won at Betsson in 2010.
Casino Listings will update this story as more developments arise.
Related: Mega Wonder Jackpot