ECS6.5 is the eleventh (after ECS1, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, and 6) tournament in the East Coast Stamina series. The objective is to try to clear as many of the hardest stamina charts as you can within the format of the tournament. It is a team tournament, and you may enter it on a team of up to three individuals. 

Once again, since this isn't a "main" ECS (like, one of the whole number ones), it's going to be split into an upper and lower division to make it more accessible to a wider range of participants.