Read this if the game doesn't load.
Play FNF vs Sonic.Exe 3.0
If you haven’t seen the Bad Sonic yet, you can see his nasty form in this FNF vs Sonic game. The point is can you play faster than Sonic?
Please note that after the game load, you need to click on the game window (black screen) and press Enter key to start the game. When you expand it to full screen, you must again click on the game window and press Enter or the game will seem to be paused forever.