I’m not sure why I’m doing this, given that it’s far too late in Halo 4’s production to be adding new vehicles, but here goes…
Name: Valkyrie
Faction: Covenant
Type: Light Land
Primary weapon: Your hand weapon
(Secondary weapon:)Nothing
Description: Unarmed, so you use your hand weapon. Shaped like Revenants, except with front tapering to a narrow back. Fast boost, able to strafe while boosting. Meant to be a scout. A passenger seat directly behind the driver’s seat - the Valkyrie is too narrow for side-by-side seating.
Name: Direwolf
Faction: UNSC
Type: Motorbike
Primary weapon: Dual mounted SMGs (not inbuilt, just mounted on top with the controls)
(Secondary weapon:) Nothing.
Description: The Direwolf is faster than the Mongoose, but much easier to damage. Also, it lacks any passenger seats and its quick acceleration renders it hard to control. Each trigger controls a separate mounted SMG.
Name: Archdemon
Faction: Covenant
Type: Upgraded Scarab
Primary Weapon: Heavy Fuel Rod Gun
Secondary Weapon: Giant Plasma Cannon
Description: The Archdemon is unique in that it has two modes - a giant walking vehicle like the Scarab, and a wheeled tank. Its four legs have inbuilt treads, and it can fold its legs to deploy its treads and become a tank. While doing so it gains speed, but loses maneuverability. It is heavily armored and controlled by a control interface in the cockpit.
Name: Reaper
Faction: UNSC
Type: Suit
Primary Weapon: Autocannon
Secondary Weapon: Railgun
Description: The Reaper is unique in that it is a suit meant to enhance the agility of the user rather than encumber him. The drawback is that it does not protect the user well. It has an inbuilt jump pack that allows it to jet into the air. The right trigger controls the autocannon on the right arm, while the left trigger fires the railgun in the left arm. Pressing the crouch button while moving will perform an evasive roll that breaks missile locks. The suit also enhances the user’s strength and he can perform a deadly melee attack.