Drive through your enemies with the war machines of the Mechanicum with the new Heavy Support Force for the Horus Heresy.
Updated February 18th, 2025, by Rob Baer. If you’re looking for the pricing, release dates, and links to order your own, we have that for you in our Mechanicum Heavy Support Force value and pricing article.
The Mechanicum is really rolling out the heavy support for the Horus Heresy, and this time, they’ve brought the BIG GUNS! Fans of the machine cult and their relentless march of destruction have a lot to be excited about with the arrival of two new plastic tanks and a heavy support box.
New Mechanicum Heavy Support Force: A Full Arsenal
This new box brings even more depth to the armies of Mars, offering unique battlefield roles and a look straight out of the forges of the Dark Age of Technology (none of those sleek new codex weapons here). Let’s break down what makes these war machines stand out.
The New Krios Battle Tank
The Krios Battle Tank is a different breed from the more commonly seen Predator or Sicaran tanks of the Legiones Astartes. Instead of heavy armor, the Krios relies on a web of energy shielding, giving it more maneuverability without sacrificing durability. This tank is all about keeping its massive centerline-mounted lightning cannon locked onto priority targets.
For those who prefer a different style of destruction, the Krios in the Mechanicum Heavy Support Force can swap its primary weapon for either an irradiation blaster or a pulsar-fusil. Equipping the latter turns it into the Krios Venator, a battlefield variant designed for more specialized engagements.
No matter which version you choose, the tank’s command throne is shielded, allowing its wired-in pilot to direct fire with absolute precision.
Karacnos Assault Tank: Heavy Armor & Devastating Payloads
If the Krios are built for mobility and precision, the Karacnos Assault Tank is all about overwhelming firepower. This machine is a variant of the Triarios Armored Conveyor, a transport known for its hermetically sealed armor that keeps its occupants protected from the horrors of war.
Instead of carrying troops, the Karacnos houses twin mortar batteries loaded with radiological warheads—ideal for wiping out organic threats ahead of the Mechanicum Heavy Support Force’s march.
On defense, this tank is no slouch. When its mortars aren’t unleashing destruction, the Karacnos hunkers down behind its thick plating. Enemies trying to get around its defenses will need to contend with a shock ram and two sponson-mounted lightning locks, making close combat a risky proposition.
Mechanicum Heavy Support Force Box Set
Both of these tanks join forces with another heavy hitter in the upcoming Mechanicum Heavy Support Force box. This set includes the Thanatar Calix Siege-Automata, a walking behemoth known for obliterating enemy fortifications with brutal efficiency.
Overall, this box looks to give Mechanicum players a formidable selection of units that can form the backbone of a force or supplement an existing army with additional firepower. So if you’ve been looking to bolster your Mechanicum collection with some serious hardware, this set brings together some of the most destructive tools available.
New Mechanicum Heavy Support Force Box Review
So, you’re thinking about grabbing the Heavy Support Force Box? Well, if you want the new miniatures, this will be the first place to score them! It also looks like it should have some decent value and save you some hobby dollars! Be sure to read our full pricing and value post on the new Mechanicum Heavy Support Force Box here.
- Base Size: Varies
- Height: Varies
- Alignment: Imperial
- Faction: Mechanicum
- Role: Heavy Support
- Material: Plastic
- Number of Minis: 3
- Release Year: 2025
Mechanicum Heavy Support Force HH Army Box Set: $185 CAD$220 £110 €145
| Models | Unit Name | Value |
| 1 | Thanatar Calix Siege-Automata | $105 |
| 1 | Krios Battle Tank | $84 (Based on similar-sized tanks) |
| 1 | Karacnos Assault Tank | $92 (based on Triaros) |
| Heavy Support Force Box | ||
| Total MSRP: | $281 | |
| Savings Versus Box Price: | $96 | |
Where to Buy Yours
Mechanicum Heavy Support Force HH Army Box Set Retail Price: $210 CA$260 €170 £125
Snag your new Heavy Support Force box set from our handpicked list of retailers, and give us a high-five in support! Every qualifying purchase helps Spikey Bits keep the lights on and the fun going.
Quick Order Links Get 15% Off or More:
Mid Atlantic US: Fabricators Forge | Bazooka Games | Frontline Gaming (West Coast US) | The Rogue Traders | Central US: Dicehead Games | Noble Knight Games | Warpfire Minis | West Coast US: Squadmarks |
Worldwide: Amazon | eBay| or | Games Workshop’s Store | UK: Element Games (UK) | Merlin’s Minis | Wayland Games | Canada: Tista Minis | Abyss Game Store | Kingdom Titans |
The Mechanicum Growing Arsenal
With these new additions, the armies of Mars continue to expand their influence across the battlefield. Whether you favor the speed and energy-based defense of the Krios, the heavy-hitting resilience of the Karacnos, or the raw destructive power of the Thanatar Calix, this release has something for every Mechanicum commander.
These machines will all be available soon, first appearing in the Mechanicum Heavy Support Force box before being released separately. Keep an eye out—these war engines are about to make their mark.
Be sure to check out all the other new release roadmap previews from Games Workshop below for Age of Sigmar, Horus Heresy, and, of course, Warhammer 40k as well:
- Warhammer: The Old World Previews & Roadmap
- Horus Heresy Previews
- Warhammer 40k Previews
- Age of Sigmar Previews
- Unsolved Warhammer Rumor Engine images
- 10th Edition release schedule and 2025 Warhammer Codex Roadmap
Latest New Release Roadmap For Warhammer
Will you pick up the new Horus Heresy Mechanicum Heavy Support Force when it is released?
