You can't. In all the Halo games you can only play as Master Chief, The Arbiter, And the ODST's .(Dare, Buck, Mickey, Dutch, Romeo)
a mod
No. You can never play as the flood.
you cant
you cant its impossible
No. The Flood is controlled by an AI (Artificial Intellgence). However, you can play as the Covenant in Skirmish.
you cannot be the flood in halo
no sorry the only way is a hack
THE halo games that have the flood are halo combat evolved,halo 2,halo 3 and halo wars
unless you using some privately owned server there is no way.
no the were only on halo rings
halo 1,2,and 3
No.