I know its tacky, but how about the Blaenau FFestiniog game? You obviously need to be careful at Minffordd to avoid a Portmeirion plasma flux, but is anyone brave enough? And don't be fooled by the apparently simplistic linear nature of the line. ahemPorthmadog!
HAH! Fools! You couldn't resist the laverbread, could you Bob the Dog? How deliciously apt! Mwahahahahah... Minffordd!!! {The laverbread, of course, is from the beach..cue Rover!}