Yes my favorite flash game Iv ever played Im so addicted to It I never get bored. Raiden X yes to play you can go to this site http://www.raidenx.net/ its a shooter it has so much power ups try it for a while dont judge it by the graphics btw I did not make this game so im not advertising to help my self
My favourite flash game ever, well, I would have to go with Dad 'n Me. If you havent played it, you should. You can find it on Newgrounds and its hilariously good! Beating up children has never been so much fun!
After that comes "Paladin The Game" and "Year of the Snake". I like games with good gameplay and grahics and atmosphere is very important as well. Good storylines are a big plus as well, but for Flash games that rarely happens.