Greatest Mecha Anime of the 21st Century, Ranked

Mecha anime entered the 21st century with decades of history behind it. Giant robots were already synonymous with some of anime’s biggest franchises, leaving newer series with the difficult task of finding fresh ideas in a seemingly oversaturated market. The best modern mecha anime proved there was still plenty of room to explore.

Some transformed giant-robot battles into political thrillers, and others combined them with romance or psychological drama. Even familiar stories about young pilots being thrown into war found new life through different worlds and characters. More than two decades later, the century has produced several series worthy of standing alongside mecha’s classics.

In Knights of Sidonia, Mecha Is Humanity’s Only Defense Against Extinction

Earth is already gone when Knights of Sidonia begins. Humanity survives aboard enormous seed ships scattered through space after the alien Gauna devastate the Solar System. Sidonia is one of those vessels. After growing up beneath Sidonia’s populated levels, Nagate Tanikaze emerges and eventually becomes a pilot of the Gardes used to defend the ship.

The setting is even more fascinating beyond the cockpit. While Nagate’s piloting gives the series its action, Sidonia itself gives those battles meaning. Every pilot is defending one of humanity’s remaining homes against an enemy nobody fully understands. Knights of Sidonia makes space feel enormous. That only emphasizes how little humanity has left inside it.

Mobile Suit Gundam 00 Brought Gundam Into the Modern World

Mobile Suit Gundam 00 begins in a future where humanity is divided into competing political and military blocs. Wars continue across the planet, and a mysterious organization called Celestial Being decides that waiting for governments to establish peace is no longer enough. Its solution is to deploy extraordinarily advanced Gundams.

They intervene in armed conflicts anywhere in the world, but that immediately changes global politics. Governments that previously fought one another have a common reason to cooperate, and Celestial Being has to confront whether using violence to eliminate violence can ever produce lasting peace. The second season dramatically expands the conflict while retaining those central questions.

SSSS.Gridman Reinvented the Giant-Robot Formula

Yuta Hibiki awakens without his memories and almost immediately begins seeing things nobody else appears to notice. Then things take a turn when a kaiju attacks. With the help of Gridman, Yuta becomes part of an enormous hero capable of battling the monsters threatening his city. Alongside the other members of the Gridman Alliance, he begins investigating why these attacks happen.

The setup is deliberately familiar, but SSSS.Gridman focuses more on what happens between those battles. The animation taps into the appeal of enormous mechanical heroes perfectly. SSSS.Gridman succeeds because it understands exactly what it is paying tribute to. Then it uses that nostalgia to tell a story with an identity entirely its own.

86 Turns Its Machines Into Coffins for an Abandoned Army

In 86, the Republic of San Magnolia claims its war against the Giadian Empire is being fought entirely by autonomous machines, but that is a lie. The Juggernauts defending the Republic are piloted by the Eighty-Six, people who have been stripped of their citizenship and forced outside the nation’s supposedly peaceful districts. The mecha reflect the anime’s brutality.

Juggernauts are fast and agile, but hardly invincible superweapons. The series eventually expands beyond San Magnolia, but it never loses sight of the people inside the machines. In 86, piloting a mecha is not a childhood dream. For many characters, it is a death sentence imposed by people pretending they do not exist.

Eureka Seven Gives Its Mecha Adventure a Heart

In Eureka Seven, Renton Thurston dreams of escaping his boring hometown. Meeting Eureka gives him considerably more adventure than he expected. However, Renton is immature, and his relationship with Eureka requires him to develop an understanding of another person rather than simply projecting his fantasies onto her. That coming-of-age story gives the mecha action its emotional foundation.

Visually, Eureka Seven remains distinctive. LFOs carving through the air on boards gives its battles a sense of movement unlike anything else in mecha anime. The anime has war, conspiracies and enormous battles. Its greatest achievement is making a boy learning how to love someone properly feel just as important as its bigger ideas.

Mobile Suit Gundam: The Witch From Mercury Made Gundam Feel New Again

Suletta Mercury arrives at the Asticassia School of Technology with little understanding of the political nightmare awaiting her. Asticassia is dominated by corporations whose children compete through a dueling system tied directly to their families’ influence. Suletta’s Gundam Aerial immediately disrupts that balance because Gundams themselves are connected to banned technology.

The school setting gives The Witch From Mercury an initially smaller scale than many Gundam series. However, that does not mean the stakes stay small. Corporate rivalries, parental manipulation and the history of GUND technology gradually reveal a much harsher world underneath the student duels. The Witch From Mercury explores Gundam‘s fascination with technology and politics through different doors.

Full Metal Panic! follows Sousuke Sagara, a young soldier who is assigned to protect Kaname Chidori, a seemingly normal high school student. To keep her safe, Sousuke enrolls at her school while continuing his work for the military organization Mithril, but his cover is not convincing. Years spent surrounded by warfare have left Sousuke incapable of interpreting everyday situations normally.

The series can deliver genuine mecha warfare through Mithril’s Arm Slaves, and then switch to school comedy without completely separating the two sides of Sousuke’s life. When the story becomes serious, the machines become more than background decoration. Few mecha anime can move between tense combat and absurd comedy this comfortably.

Code Geass Puts One of Anime’s Greatest Antiheroes in Command

After gaining the supernatural power of Geass in Code Geass, Lelouch adopts the identity Zero and begins leading a rebellion against the Holy Britannian Empire. His motivation is deeply personal. Knightmare Frames give that rebellion its military backbone. Machines such as the Lancelot and Guren make battles fast and increasingly spectacular as technology improves throughout the series.

Nevertheless, Lelouch’s greatest weapon remains his strategic mind. He anticipates enemy decisions and treats entire battles like enormous chessboards. Geass gives him another devastating advantage, but its limitations ensure he cannot simply command every problem to disappear. His decisions also carry consequences. The Knightmares Frames are excellent, but Lelouch is the machine powering the story.

Mobile Suit Gundam: Iron-Blooded Orphans Makes Every Victory Cost Something

The children of Tekkadan begin Iron-Blooded Orphans with almost nothing. They work for a private security company on Mars, where adults regard them as disposable labor. When a mission goes wrong, the young soldiers seize control and establish an organization of their own. Orga Itsuka, Tekkadan’s leader, gives those battles direction.

He becomes obsessed with finding somewhere his people can belong. Every success consequently encourages the group to keep moving forward, even when the path ahead becomes increasingly dangerous. The political world surrounding them is happy to exploit that ambition. Iron-Blooded Orphans understands that winning battles does not necessarily mean winning a war.

Gurren Lagann Pushed Mecha Anime Beyond Every Possible Limit

Simon begins Gurren Lagann digging holes underground. His life changes when he discovers the small mecha, Lagann, and joins Kamina in reaching the surface. Humanity has been forced underground while Beastmen dominate the world above, giving the pair a hunger for freedom. Kamina’s refusal to accept limitations is Simon’s main driving force early in the story.

However, Simon eventually has to discover his own reason to keep moving forward. Gurren Lagann evolves alongside Simon. What begins as a strange combination of two relatively small machines eventually escalates through forms capable of fighting on scales that make the anime’s earliest battles seem microscopic. The escalation works because the emotional foundation never disappears.