Some of my ideas:
Chupacabra (ultimate teamwork vehicle):
A vehicle created using technology from the Power Drainer. The driver can use a beam to drain energy from a targeted vehicle or player. The beam cannot kill the player, but will bring down his/her shields. The beam can destroy vehicles after all the energy has been drained. The energy will fuel up to two turrets on the vehicle. The turret can shoot out a charged pulse of energy. The amount of energy gained after a power drain depends on what it drained. For example, a tank will give it 50 charge, a medium sized vehicle will give it 30, a light vehicle will give it 20 and a player’s shields will give it 10. The maximum amount the vehicle can hold is 200 charge. The turret can cause mass amounts of damage depending on the charged time. It can also switch to a different version that acts sort of like a Gauss turret, but still uses energy. Using 100 charge, the driver can activate a energy field that drains the shields and health of nearby players, including the ones in the vehicle, and also give the vehicle invincibility for 15 seconds. This will be used mostly as a last resort, because after the 15 seconds are up, the vehicle will be rendered useless, and the players inside the vehicle and the ones nearby will die.
Horsefly (Flood carrier):
A part-organic, part-mechanical vehicle/creature that carries Flood forms around in a compartment in it’s legs. They can be released, and will infect sentient beings that come in contact with them.
Gazelle (courier vehicle):
Created using Covenant and UNSC technology, it is similar to a Mongoose, but can travel faster, and has a boost mechanism.
Stag Beetle (armoured vehicle):
This vehicle has a horn or pincer on the front, and can be used as a battering ram, or to slice the enemy in half.
Leech:
An organic creature that can latch on to players and drain their health slowly. The only way to remove it is to have another player shoot the Leech a couple of times. Thrown as a grenade.
Leviathan:
A huge vehicle that acts as a vehicle bay, and a submarine.
Dingonek:
A vehicle that is used to travel through jungles, swamps and lakes. Equipped with tusks for towing.
Yeti:
A vehicle that can travel through the harshest environments.
Megalodon:
A submarine equipped with torpedoes.
Mokele-mbembe:
A vehicle used for combat near lakes and in jungles.
Roc:
A combat aircraft equipped with talons for grabbing hold of enemy vehicles and dropping them from high in the sky.
Chimaera:
A multi-use vehicle. Can be used in combat, or as transport.
Thunderbird:
A variant of the Roc, armed with a mini-MAC cannon.
Wendigo:
A device that can be planted on vehicles. This will let the player who placed it take control of the vehicle, until the effects wear off, or until removed by another player.
Ya-te-veo:
A stationary machine that drains the shields and health of an enemy by entangling them with long tentacle-like wires.
Any comments will be appreciated.