You can play Fnf Vs Stickman in a99.io as unblocked.
As in other FNF Modes, what you need to do in this mode is to go against your opponent and make the melodies one by one using the arrow keys. Play all the melodies in front of the Stickman character and try to beat the Stickman character. A99io.Com wishes you a good time. Fnf Mods