343 Guilty Spark is one of the most recognizable characters from the Halo universe. And how could you not love that little sphere of questionable moral standards? While he plays a major part in the campaign in Halo: Combat Evolved Anniversary, he never showed up in multiplayer. Well, until now, that is.
Boot up the map Installation 04 in Firefight mode. If you head to the right and follow the path from your spawn point, you'll find a room that has a locked glass door that will not open. If you hang out around there, 343 Guilty Spark will come up look around. Check it out for yourself!