This article is considered accurate for the current version (1.54) of the game.
The “Scorpion” HC-class tank is a moderately armoured infantry support vehicle with twin, high-powered heavy machine guns and short-range radios for improved intelligence support. In addition, exterior seating is available for infantry.
— In-game description
The HC-2 “Scorpion” (also known as an IST) is a ColonialLight Infantry Tank designed to support infantry and other combat vehicles against enemy infantry. It is equipped with a radio that gathers intelligence within a 60 meter radius and with two independent 12.7mm machine guns.
NOTE: The seats of this vehicle are separated into two types; interior seats and exterior seats. Depending on where the player enters, they can only access those types of seats. Seats indicated with a (*) represent the exterior seats of the vehicle.
The HC-2 “Scorpion” is equipped with two main armaments:
2x High Velocity 12.7mm Machine Gun
Mounted on the left and right sides of the chassis (115 degree firing arc)
The HC-2 “Scorpion” has 3300 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: 30% (Anti-Tank Mines always disable them), Fuel Tank: 20%, Turret/Cannon: 20%, Second Turret/Cannon: 20%. It has Tank Armor. With it, in best case scenario, penetrating projectiles only have a 30% 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 160 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.
Automatically gathers Map Intelligence within 60 meter radius every few seconds and transmits it .
The HC-2 "Scorpion" is best used as a support tank, engaging infantry and suppressing defensive structures with AI. Armed with two 12.7mm Machine Guns, a single IST can support an entire squad of friendly vehicles, and provide them with Map Intelligence when the engagement goes out of map coverage.
Its large inventory capacity grants the IST flexibility as a support vehicle. It can carry a generous amount Basic Materials, ammunition, and fuel in order to support friendly vehicles, extending their engagement periods. It can support battlefield engineers by carrying materials, and support infantry by holding spare ammunition.
It is helpless against tanks, any armored vehicle with AT capabilities, and AT structures. Although it specializes in eliminating infantry, it is vulnerable to infantry AT weapons. ARC/RPG users and flanking enemies can avoid the IST's arcs of fire, and are therefore especially dangerous. Friendly infantry should support the IST by covering its flanks, flushing out hiding spots, and eliminating any enemy infantry carrying AT weaponry. Friendlies carrying radios can take advantage of the Map Intelligence provided by the IST to protect it from sneaky foes.
Unique among all tanks, the IST costs construction materials to upgrade its tier rather than processed construction materials. Therefore, the best way to increase survivability of the vehicle is to upgrade it to Tier 3, which will cheaply and substantially increase its health. Doing so will give the tank as much health as a Bardiche, making it one of the tankiest vehicles in the Colonial arsenal.
It's initial cheap upgrade cost(s) was likely due to the Devs wanting to increase the number of ISTs used in combat, saying in the Update 1.50 ('Inferno') Dev Stream that they hoped to see ISTs "being fielded more than twice". This upgrade cost could also be due to the fact that its stats were never updated to fit its new role in late-game combat (its initial stats were only suited for mid-game combat against half-tracks and ACs).
Due to the base chassis being buffed, the upgrade cost was changed accordingly, making it more expensive to upgrade.
The concept of the Infantry Tank was developed by the United Kingdom and France during the Inter-war period (after World War I and the years leading up to World War II). See Infantry Tank.
The HC-2 "Scorpion" resembles the Panzer I (a German Light Tank armed with a dual machine guns housed in the turret). However, the Panzer I's machine guns could not be aimed independently, and only had two crew members.
The tactic of tank-riding was first used by the Soviets in World War II, in which Soviet infantry would ride on top of their tanks, then quickly dismounted when they approached the frontlines.
The HC-2 "Scorpion" from the front
The HC-2 "Scorpion" from the rear
A HC-2 "Scorpion" with the Commander popping out of the hatch