have you EVER been opponent of yourself ? Lets try it out.

                                     Me Vs !Me

https://play.google.com/store/apps/details?id=com.vintagegames.mevsme

Me vs. !Me, 
You must have played online games against others many times but have you ever played a game against yourself ? Sounds crazy isn't it ??

You must have faced thousands of opponents but have you EVER been opponent of yourself ? So let's do it :)