Methane Wagon

The Methane Wagon is a modified version of the Shadow.

Overview
The Methane Wagon is an unstable, slow, and rickety modified version of the Shadow created by Unggoy. It has a parking brake made of a chunk of wood. The Methane will detonate violently when its structural integrity is compromised due to the volatile infusion-enriched methane stored on it.

Armament and support
The vehicle emits a Methane aura, clouds of infusion-enriched methane, that makes nearby Unggoy aggressive. The wagon can also catapult kegs of Methane that release enriched gas clouds of the infusion-enriched methane.

Operational history
In 2559, when Yapyap rebelled against the Banished during their battle with the crew of the on Installation 00, Yapyap had a few Methane Wagons under his control, hoping to upgrade them.

Halo Wars 2
Methane Wagons are exclusive to Yapyap and can be made at Banished outposts once the leader power has unlocked them. They perform poorly against infantry, vehicles, aircraft, and structures as they primarily buff allied Grunt units and debuff enemies. They will also explode upon destruction, causing damage to nearby enemy units. In Blitz, Methane Wagons cost 70 energy. Despite being rated poorly against enemy units, Methane Wagons will typically outperform Eklon'Dal Workshop Marauders due to their buffs and debuffs.
 * Info: Support Vehicle, Methane aura boosts Grunt combat effectivenes and debuffs enemies, Fires methane shells
 * Tier: 0
 * Cost: Population 4, Supplies 300, Power 120
 * Methane Wagon upgrades
 * The Good Stuff
 * Info: Increase Methane radius and shell effectiveness, Wagon becomes tougher.
 * Tier: 2
 * Cost: Supplies 0, Power 500

Pro

 * Useful to buff up Grunt units.
 * Can be utilized as a suicide vehicle due to damage dealing upon destruction.
 * Methane can slow down and deal damage to enemies.

Cons

 * Weak fighting strength
 * Only useful when with a group of Grunts.

Trivia
In Halo Wars 2, if a Spartan hijacks a the Methane Wagon, the 2 grunts will remain in the vehicle. This is the second vehicle where the additional crew members remains in the vehicle while hijacked and continues fighting with the replaced driver.
 * The first was the Marauder.

List of appearances

 * Halo Wars 2