After a beta weekend that experienced some "technical difficulties", 343 announced they will be extending the period to test out their new multiplayer mode for Halo 5! Warzone Firefight. This means that the beta will not end until tomorrow around 10am PST.
Warzone Firefight is the return of the "horde mode" that was first introduced in Halo ODST.
If you haven't tried it yet hop on now!