We've yet to see or hear the Rail Gun fired (officially), but you can expect it to behave much like the Spartan Laser, but probably with a bit more splash damage.
The first Halo 4 gun to be revealed was the Sticky Detonator. Seen by 343i as a replacement for Halo: Reach's grenade launcher (pro-pipe) it is supposedly much easier to pick up kills with. It sports a much bigger screen than its Reach counterpart to help you time your detonations. Tthe projectiles will now stick to surfaces as opposed to the bouncy projectiles of the Reach equivalent.
Unnamed Promethean Weapon
We don't know the name of this weapon, but it can be seen on the Halo 4 page on xbox.com. The silhouette makes it look a bit like a crossbow. We've yet to see it fired so can only speculate as to what role it fills in the arsenal.
I'm sure we've all seen this beauty in action by now, the Promethean equivalent of the Shotgun. A close range power weapon that vaporises foes. It's rounds can also bounce off hard surfaces which promises some interesting gunplay possibilities.
The Light Rifle is the Promethean utility weapon, it has burst fire and single shot modes like the Halo 2 Battle Rifle. In the footage we've seen it has very fast kill times and looks a little overpowered, but I'm sure 343i will be hard at work making sure it fits in nicely alongside the other utility weapons.
The Storm Rifle is an evolution of the previous games' Plasma Rifle, it is rapid fire like its predecessors, but also more accurate due to the longer barrel. The name is interesting as we've seen from some Halo 4 toy packaging that Grunts were referred to as "Storm Grunts". Perhaps "Storm" will be some sort of socio-political faction among the Covenant. This may also go some way to explaining why they're fighting us again.
Mystery Weapon #2
No silly, not the Rocket Launcher, that stubby gun on the Spartan IV's leg has yet to be officially revealed. It has a similar form factor to the old SMG, but the orange light and angular lines suggest it might be some sort of Promethean secondary weapon.
Mystery Weapon #3
This is another weapon that we've yet to see fired, but it looks seriously meaty. With that form factor it has to be a power weapon akin to the Rocket Launcher or Spartan Laser.
The Promethean Sniper was mentioned by David Ellis in the Spartan Ops gameplay video I posted the other day. The long barrel on this weapon would suggest this picture is of the not-yet-officially-announced Promethean Sniper.
The Promethean Repeater was shown in the E3 Spartan Ops build, the name has only been mentioned once by anyone at 343industries when BS Angel referenced it in the Weekly Update that followed E3.
- Cowboy Out.