Terra Formars Review: Humanity Sent Cockroaches to Terraform Mars. The Cockroaches Evolved.
by Yū Sasuga (story) / Kenichi Tachibana (art)
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Quick Take
- Humanity sent cockroaches to terraform Mars centuries ago; the cockroaches evolved into humanoid giants; soldiers with insect-based genetic modifications are sent to fight them
- Extreme action science fiction with creative bug-based power systems and intense combat — and significant content controversies readers should know about
- 27 volumes, complete
Who Is This Manga For?
- Readers who want extreme action sci-fi with creative biological power systems
- Fans of military survival stories with high casualty rates
- Anyone who wants spectacle-focused action manga with strong art
Important note: Western readers should be aware that the manga has been criticized for racial imagery in character design and framing. This is documented and worth knowing before starting.
Content Warnings & Age Rating
Age Rating: M (Mature) Content Warnings: Extreme graphic violence and gore, racial imagery in character design (widely documented criticism), body horror, high main-cast death rate
Significant content warnings apply. The racial imagery controversy has been documented by Western critics and should inform whether to engage.
Yu's Rating
| Category | Score |
|---|---|
| Story Depth | ★★★☆☆ |
| Art Style | ★★★★☆ |
| Character Development | ★★★☆☆ |
| Accessibility for Non-Japanese Readers | ★★★☆☆ |
| Reread Value | ★★☆☆☆ |
Story Overview
In the 21st century, humanity sent cockroaches and mold to Mars to begin terraforming the planet. Five hundred years later, the terraforming partially succeeded but the cockroaches evolved — into humanoid creatures with superhuman strength, speed, and the ability to learn from what they kill.
Human soldiers, modified with the genetic material of various insects and arthropods, are sent to exterminate the evolved cockroaches and secure the planet. Each soldier has a different insect adaptation: ant strength, mantis speed, dragonfly compound vision.
The manga follows multiple groups of soldiers through the Mars campaign and eventually back to Earth as the conflict expands.
Characters
The ensemble is large and the death rate is high — characters are introduced, developed briefly, and killed. This is a deliberate structural choice that creates genuine stakes but limits attachment.
The Cockroach Antagonists — Visually distinctive and physically intimidating; the manga gives them no interiority, which is a deliberate choice but contributes to the controversial racial framing.
Art Style
Tachibana's art is detailed and visceral — the combat sequences are dynamic and the insect-modification designs are creative. The gore is extreme and clearly intentional as spectacle.
What I Love About It
The insect power system creativity. Each soldier's modification draws on real insect biology applied to combat situations — a soldier with parasite wasp genetics controls enemies differently than one with bombardier beetle genetics. The biological specificity makes the power system interesting in a way generic strength increases are not.
What English-Speaking Fans Say
Terra Formars has a divided Western fandom. The action and power system creativity are consistently praised. The racial imagery controversy has been extensively documented — many Western readers find it a barrier to engagement, and this is a reasonable response. The controversy affected the manga's Western marketing and should be part of any honest discussion of the series.
Memorable Scene ⚠️ Spoiler Warning
The early sequence establishing what the evolved cockroaches are capable of — the massacre of the first expedition — is the manga's most effective scene: establishing the threat with maximum efficiency and no mercy toward the cast.
Similar Manga
- Gantz — Forced combat against alien threats, similar extreme content
- Attack on Titan — Humanity vs. monsters, similar escalation
- Biomega — Post-apocalyptic survival, similar dark sci-fi
- All You Need Is Kill — Military sci-fi, less extreme
Reading Order / Where to Start
Volume 1. Be aware of the content warnings before starting.
Official English Translation Status
VIZ Media published the complete 27-volume series. All volumes available.
Pros & Cons
Pros
- Creative biological power system based on real insect science
- 27 volumes, complete
- High-stakes ensemble with genuine casualty rate
Cons
- Racial imagery in character design (documented, significant)
- Story depth is limited compared to the action spectacle
- Extreme violence limits the audience substantially
Format Comparison
| Format | Notes |
|---|---|
| Individual Volumes | Standard VIZ release |
| Digital | Available |
| Physical | Fine |
Where to Buy
Get Terra Formars Vol. 1 on Amazon →
This post contains affiliate links. If you purchase through these links, I may earn a small commission at no extra cost to you. As an Amazon Associate, I earn from qualifying purchases.
*Affiliate link — I earn a small commission at no extra cost to you.
Written by
Yu
Manga Enthusiast from Japan
I grew up in Japan and manga literally saved me during a tough time in elementary school. My English isn't perfect, but my love for manga is real — and I want to share it with you.
Disclosure: This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.