Best games on Newgrounds would probably be Portal Defender, Bunker, and the Exmortis and Submachine series. In my opinion, of course.
As for the greatest game ever made...well, that's a pretty open question. A lot of games were excellent for their time even if they're crappy compared to modern games, but you can still appreciate them if you keep the context in mind.
The very first game I ever played was The Legend of Zelda: Link's Awakening, back when I was eight. Even though its graphics are considered subpar today, I still love it. Same with the Game Boy version of Yoshi's Cookie (the second game I played).
rewindfr0g
I think Thing Thing Arena 3 is the best, but Portal Defenders is also pretty good...
kingbotina
ty for the coment.
I think Thing Thing arena 3 is the best too