Here we see a screen very familiar to Halo players-- a gameplay screen overlaid with a party list. Three out of a possible six players are in the party, which is joinable. Level 6 Halcylon and level 12 Deej will be sure to blame level 16 Stoshy for anything that goes wrong. The higher level Stoshy, we assume, is the one with the more impressive and cleaner-looking spaceship in the middle.

To the left is what appears to be a list of gameplay hoppers.

The first "The City" may be a safe area for trading, preparation and socialization. It's labeled "Home".

The next selection may indicate solo or co-op progress through campaign mode. It's labeled "Chapter 3" at the location Shores of Time, which a previous screen seems to have indicated is on Venus.

The next item, Bounty, looks like something similar to Reach's weekly challenges; a time limit is given for collecting a weekly bonus, probably for completing certain gameplay objectives in either solo or multiplayer.

"Strike" is listed as a "random hopper" and probably means something similar to an objective-based playlist in Halo. Note the arch icon without the dot underneath the arch.

"Raid" is a term familiar to those who play MMOs. Here, the arch icon has a circle underneath it, and instead of "random hopper" appears the text "Depth of Darkness". This may indicate cooperative play of some type.

The last entry, Faction Wars-- a term already in use in Eve Online-- is most likely team-based competitive multiplayer. How rivalries between factions of Guardians will play out against the backdrop of humanity's struggle to retake the solar system from hostile aliens is yet to be answered.. much like the question of why we're here at a red base at the bottom of a box canyon looking across at a blue base.