Game suddenly surfaced from the deep archives of my brain. Frantically searched yygarchive for the keyword "online". Lo and behold- Blobbz Online.

It's exactly as I remembered it. You have to sign up to play on an ancient website that is miraculously still alive. Then you embark on a short adventure with five REAL players. I was lucky enough to have the dev in my lobby and some crazy shit went down. Man what a ride. Don't even know how to rate a game like this. I can hardly believe it's actually listed on this site.