https://wccftech.com/every-darts-location-in-watch-dogs-legion-and-how-to-find-it/

Because of the weather, and the mud, and the antisocial nature of the population, and the weather again, England has never been a bastion of sportsmanship. We might claim to have invented Football, but we are yet to master it. We pretend to enjoy running marathons in mud because we are stubby and petty. If we had to hold up a sport that truly encapsulates Britain, it would be Darts.

Understated, nuanced, and most often played by overweight middle-aged men with a beer in their hands, darts is truly the sport of England. And in Watch Dogs Legion, you can play it too. In fact, you can play it a lot! 19 times in fact.