This article is considered accurate for the current version (1.56) of the game.
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Built on an inverted Flood chassis, the Mk. IX Stain is a fully-featured mobile artillery platform. Once deployed, the Stain can fire a 150mm cannon over long-distances to pummel enemy positions with indirect fire.
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— In-game description
The Flood Mk. IX Stain is a late-game WardenBattle Tank and a type of SPG. It is equipped with a 150mm artillery cannon, which can bombard enemy defensive structures from long distances.
The Flood Mk. IX Stain has 4800 HP and is disabled under 30% health. It has "Heavy Armor" resistance: it can soak small arms fire, shrapnel, and 12.7mm machine guns, and it is immune to Flamethrowers. But heavy explosives and anti-tank weaponry are a real threat to it. It has subsystems that have a chance to be disabled by heavy explosives and anti-tank weaponry if hit specifically: Tracks: 35% (Anti-Tank Mines always disable them), Fuel Tank: 25%, Turret/Cannon: 35%. It has Tank Armor. With it, in best case scenario, penetrating projectiles only have a 25% chance of penetrating and doing damage. That chance goes up quickly if the armor is worn or if it is shot from up close, or on the side or rear from a direct angle, or with ammo that has penetration bonuses. It takes 220 Basic Materials to fully repair it from 1% to 100% health with a Hammer. Its health, subsystems, and Tank Armor can be instantly repaired at a Garage for 100 Basic Materials.
Standard Equipment Loadout
Like with every other armored vehicle, the crew should ALWAYS equip themselves with a Gas Mask and at least one Filter to avoid dying to Gas Grenades. Additionally, they should bring a Hammer and Basic Materials to repair the SPG. These tactics can be buffed by wearing either a Tank Uniform or an Engineer Uniform.
The high rate of fire of SPGs make them a powerful tool for suppressing enemy pushes, and their high resilience to counterbattery makes them especially useful for sieging concrete bunkers with howitzer garrisons.
Due to their outstandingly high price and significance, SPGs are a high-value target on the battlefield. To prevent enemy infantry or tanks from destroying them, more effort should be put into preparing defenses around them than other artillery guns.
Tips
Like all vehicles that use large shells, they can be quickly submitted into them without accessing their inventory
While this can be done for all vehicles, it should only be done if they can carry/use large items
Equip the shell and walk up to the vehicle
Submit the shell into the vehicle - pressV
Trivia
The Flood Mk. IX Stain is the first Warden vehicle that has its engine in the front, which makes it more vulnerable to fuel leaks if it's attacked from the front. This is only seen in one other vehicle, which is the ColonialH-10 “Pelekys”.
Gallery
The Flood Mk. IX Stain from the front
The Flood Mk. IX Stain from the rear
The Flood Mk. IX Stain in its deployed form
The Flood Mk. IX Stain shown in the Update 1.54 Dev Stream
