Robbie Green beat fellow Englishman James Wilson 5-1 in the final to claim the men's title at the 29th Isle of Man International Darts Festival on Sunday.
Green, from Liverpool and nicknamed "Kong," had an average of 114.65 in a storming final performance.
The 39-year-old said: "I have not played well all weekend but it all came together in the final."
Meanwhile, England's Lorraine Winstanley beat Holland's Sharon Prins 5-4 to claim the woman's title.
Green added: "This is a tournament that I have never done well in.
"I'm already looking forward to coming back as the defending champion."
Martin Atkins and Allan Edwards won the men's pairs and Zoe Jones and Anneke Kuijten claimed the ladies'.
Elsewhere, Scott Waites and partner Dee Bateman reclaimed the mixed doubles title.
Waites also won the concurrently run Classic Men's singles, with former world champion Anastasia Dobromyslova winning the Classic Ladies title.
Players were competing for world ranking points which count towards qualifying for a place at the World Championships.
More than 1,000 darts players and fans travelled to the island for the four-day event held at the Villa Marina in Douglas.