There's a ton of new info about Halo 5: Guardians

At least one element of this rundown could be considered a spoiler. Tread carefully, friends.

Halo's always been a series that chases the big awards, and this year it's comfortably winning this "Most Information Revealed Before The Actual E3 Reveal" trophy I've just chiselled. In its latest prize-winning bid, The Guardian just posted a huge chunk of article after its first play of the game - who knows how long that's going to stay up, but we've got a sizeable set of details about the game as a result:

The game's set 8 months after the events of Halo 4
The campaign is definitely played from two different persepctives - Master Chief's Blue Team and Agent Locke's Fireteam Osiris
Each member of Blue Team has different skills (it's not clear if that's a narrative point or an actual game mechanic)
Fireteam Osiris is made up of Agent Locke, Kelly-087, Tanaka and Edward Buck (played by Nathan Fillion)
Playing campaign alone, you can order the rest of the Fireteam using a set of simple commands such as "go here, attack that, revive, drive vehicle"
Reviving other squad members offers you a reward (not clear what this is right now)
Fireteams have dynamic conversations, reacting to what's happening around you
The Covenant are an enemy once more, "resurgent and eager to reimpose themselves"
Promethean enemies return, and with new enemy types to battle
The Arbiter (who we already knew was returning) is fighting against the Covenant
Campaign Spartans are given extra abilities on top of the multipler ones (dashes, ground pounds etc.) - "revive" and "tracking"
Cortana returns in some respect, saying "The Reclamation has begun" in a cutscene that could be a hallucination or dream
Single player maps are bigger than usual, with alternate routes to take and multiple ways to complete objectives - offers options for co-op and replay value
Difficulty scales depending on the number of human players - the number of enemies, and their skill levels are affected
In co-op, players are encouraged to work in pairs going down different routes
Graphics-wise, it is "a huge step forward"
The campaign takes you onto Research and Development vessel, the Argent Moon
The soundtrack has been re-recorded at Abbey Road, with a piano motif added to the familiar main theme
There are 40,000 lines of dialogue in the game
Sound effects have been re-recorded in multiple locations
Locke has his own bombastic theme tune

So there's a bit of stuff for you to chew over. Expect to hear a lot of this reiterated at the Microsoft press conference on Monday - but remember that there is at least one "brand new multiplayer experience" that's being saved up for the show itself.