Tremortusk

by SerialBuilder

4.3 (6 Reviews)
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Run #02

The Tremortusk is SerialBuilder’s take on the heavily armoured war machine from Horizon Forbidden West. This is his largest build in terms of part count, and showcases an imposing silhouette packed with accurate mechanical detailing, from its reinforced plating to its devastating weapon systems. The build includes an integrated diorama base, articulating shock canons and an adjustable head.

Time27-40 hours
InstructionsHigh-quality downloadable PDF
Build difficultyBased on 6 reviews
BeginnerIntermediateExpert

Customers rate this build as Expert Builder

Imposing Stance
1

Imposing Stance

The Tremortusk is built on a detailed diorama base and features stance that is both accurate and imposing. This war machine is ready for battle.

2

Detailed Armor and Weapons

Every panel and attachment is carefully designed to match the distinctive features of the Tremortusk. The beast comes loaded, ready for war.

3

Articulating Functionality

The Tremortusk is SerialBuilder's first Horizon beast that features adjustable shock cannons depending on whether you want it in a passive mode or in attack mode. The adjustment is done using an included built wrench.

Specifications

Pieces7,982
Dimensions
L50×W30×H39cm
Scale1:20
materialHigh Quality ABS
compatibilityLEGO System Compatible
Build time27-40 hours

Our thoughts on the design

The Tremortusk is SerialBuilder's most recent design of all the beasts in the Creator Set and it really shows how far he has come as a LEGO designer. Featuring a few firsts in his builds, the Tremortusk comes with a diorama base and articulating Shock Cannons which were a was surprise. The techniques used are more advanced, the sturdiness of the appendages and panels is top-notch and as always, the stance is very accurate, along with all the details of the build. You may need an extra pair of hands to help you with attaching the beast to the base, but it's worth it.

What's in the box?

Premium Quality Bricks

"Comparable to LEGO"

*based on the average quality rating from verified builders

Numbered Bags

20bags

“Get Started” Card

QR code with a link to access your high quality downloadable PDF instructions

Fixes we've made

Improved the stability of the build

The original design, whilst featuring a solid overall build structure, had a critical weak-point at the feet. This meant that moving the build around could result in one or a few of the feet unseating from the base, causing the heavy beast to come crashing down. Great in-game, not so much IRL. We fixed this by securing the feet further into the base.

Severity: Critical

Customers' Builds

Real photos from builders who completed the Tremortusk

Tremortusk Reviews

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Showing 4 of 6 reviews

K
Kira P Verified
21 Jun 2026
Level: Expert BuilderBrick Quality: Comparable to LEGO

Would build again!

This was a very fun build, I love that it has a diorama base! The articulation is wonderful, I am so impressed!

Most Surprising Thing

Realizing that we were putting tiny guns that can actually fire into the turrets.

What Can We Do Better?

The mini guns in the turrets could use a little more head room inside. Each time I tired to close it the gun would pop off and then rattle inside, so ...

Q
Qwen Verified
15 Jun 2026
Level: IntermediateBrick Quality: Comparable to LEGO

The Big Boy

This is my third build of the Complete Set, having started with the Grazer and the Sawtooth… and my goodness this one sets a new standard. This build is a beast! It definitely poses a challenge in a few spots, but it is absolutely worth the effort and so much fun to assemble. I’m actually kind of sad he’s done. There are some challenging parts, which I’ll go into in the “what can we do better” section, but honestly the final product is so worth it. A word of advice though: take your time, and check the instructions carefully. With such a big and complex build, it can be easy to misread instructions if you rush, but I promise you the instructions do actually show you exactly what you need to do. Just take your time. I’m honestly shocked by the creativity of engineering that went into this design. It’s unreal. And despite the nature of the build, it is actually way more stable and sturdy than I expected! Overall, so thoroughly impressed, and so glad I got the Complete Set. Cannot wait to see what the Thunderjaw has in store for me next :)

Most Surprising Thing

The sheer creativity of the engineering, and the attention to detail on such a massive and complicated beast! I still sometimes look at the finished ...

What Can We Do Better?

There are a handful of pieces that I found did not fit as intended. Specifically, any time a thin pole was meant to be threaded through a connector j...

M
MTVV Verified
13 Jun 2026
Level: IntermediateBrick Quality: Comparable to LEGO

You hit the nail on the head.

I finished the Tremortusk as my second build, and here too I really like both the look and the stability, which is perfectly suited to a model that is primarily meant for display.

Most Surprising Thing

The final size

What Can We Do Better?

The quality of the parts is consistently impressive. However, I have to say that the moment I need a hammer and a vise to complete an assembly step is...

A
Alice Verified
1 Jun 2026
Level: Expert BuilderBrick Quality: Comparable to LEGO

Tremortusk

Oh boy was this one rough, over all I had fun building it, two weeks and five days and a lot of frustration. Between parts falling off or with how touchy other parts where or when i had to use a literal hammer to put some of the parts together.. over all though a good build and I had fun

Most Surprising Thing

the movement of the parts, especially the guns on his sides, like you guys didn't even have to include that but you did and its amazing.

What Can We Do Better?

the instructions i had to use a literal hammer for are, 1471, 1630, 2206, 2213, 2215, 2247, 2254, and 2256 (also 2206 repeats in the version 1.1 when ...

Tremortusk

Tremortusk

by SerialBuilder

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