S0rry fer double post, but team games are so dramatic. At one point, through largely peaceful means, I managed to get to 2000 mass, mostly by luck in a blue dominated arena as blue, then noticed a huge, 2000 sized green. I was a little bigger, but green had been expanding recently, so I followed it so it couldn't attack any of the 400-1000 rangers on my team. I was a little slower, but it changed direction too much. It tried to eat the people who fed me, but it couldn't split cuz I'd eat half, and they just went round the other side. After a 5 minute deadly tussle of wills, a coupla 500 sized teammates repeatedly feeding me got me large enough to expand over it, to like 4500. I had slain their champion, the green bar more than halved. I felt like Achilles, though it was mostly other people.
I tried to payback everyone who had donated, as I was losing mass so quickly. Then at 1500 or so I started killing smaller, craftier opponents by letting them get me split and eating them, which kept my mass up for a bit, though after a while we dominated too hard. I also donated many to people whose names I liked, and often took the spikeball in a large battle to give us a ground advantage. A few loyal people tried to get me back to my former glory, but there was no real point, and its more fun when you're smaller. After doing what I had had done for me to a few guys, I retired from a 800 sized hunter, feeding myself to "share to win", who had nourished me when I was small, and had helped me fight the green colossus, then had fed me a lot later one. We had decisively won anyway, and I tried to exit the game as I disappeared inside him, though he couldn't really eat me, as a symbolic action. I got the feeling he was a really nice guy. No idea why I think it's a "he", but the casual lack of capitlaisation gave me that impression.
What a great game! There should be a website fer epic Agar.io stories.