One of the new alien weapons, the Needler Rifle, combines elements of the old Covenant Carbine and the homing pink mist of the Needler, which sounds a particularly deadly combination for mid-range headshots. On the human side, the new all-purpose weapon is called the DMR - Designated Marksman Rifle - and replaces the trusty Battle Rifle of Halo 3 as the go-to gun for anything less than sniper distances.
There are new enemies to go with the new guns, in the form of Skirmishers - they look like bigger, nastier versions of Jackals, with feathery manes and a penchant for stalking in packs. Even the once-comical Grunts look like a force to be reckoned with in the gritty new world of Reach, and everyone's favourite old foes, the Elites, take their rightful place at the head of a Brute-free, non-English-speaking, alien army.
Since the protagonist is tougher than the characters in ODST, but not quite as hard as Master Chief, the health system is pitched somewhere between the two. The shield is slower to recharge than in Halo 3, and there's an underlying health bar that will, presumably, need to be topped up via med packs - like much of Halo Reach, all of this is still subject to regular tweaking and testing, as the Bungie team search for the optimum settings.
Ever since the scene shortly after crash landing in the very first game, where Master Chief rounded a corner and was presented by a battlefield of then unprecedented scale for an FPS, the Halo franchise has been renowned for putting players in the midst of convincingly huge fights. Reach promises to take things further still, with an engine that can handle up to 40 AI combatants and 20 vehicles on screen at once. If those numbers don't seem particularly impressive, remember that's potentially 40 fully active Covenant warriors, hunting in packs, communicating, flanking and
firing at you. Outside of the player's immediate sphere of influence, distant battles play out using lower level AI and flocking behaviour designed to look as close as possible to the real thing. Only once you're within range do these enemies become sentient.
The effect is that you're a participant in war on a grand scale. Everything you can possibly hit with a gun is fighting back with the kind of smartness that has often given the best battles in Halo games the kind of emergent unpredictability you so rarely see in more strictly scripted shooters.
Not only are the battles more heavily populated than ever before, the environments that contain them are spread over a wider area. In missions where there are multiple objectives, you'll often be free to choose the order in which you tackle them.
If you're playing a four-man co-op Campaign with friends, the game engine can cope with everybody splitting up and doing their own thing, at least to a certain degree. You might take a buddy to clean up a nest of Covenant snipers in one area, then see the other two players fighting in the distance, down on the main battlefield. As in Halo 3, you'll be able to take a party of friends through all of the game's modes, including Theatre, Forge and some as-yet unannounced additions to Campaign that Bungie are planning in order to add replay value.
OUT OF REACH
Beyond the activities of the Spartan team, Human marines help fill out the warzones. Responding to criticism of the vocally colourful but visually bland marines in Halo 3, Bungie has given the UNSC forces on Reach a makeover with a level of detail reminiscent of Ghost Recon. You'll be able to recognise different types of soldiers, and they'll sport different combinations of equipment and armour.
Raising the realism still further, for the first time in a Halo game some of the human models are animated using motion-captured actors. Even facial animation - something that hasn't exactly been a strong point of the series so far - has been given the motion capture treatment, and the Spartans will remove their helmets and reveal a level of emotional authenticity that would turn Master Chief green with envy.