The 50 Best Sci-Fi Anime of All Time, Ranked (2026)
Last updated: 2026-05-03 · Entries are ranked by MyAnimeList community score, pulled once and cached so the list stays stable between manual refreshes. Each season is treated as its own entry, matching MAL's catalog. Top-10 blurbs are written by the Anime Facts 101 team and reflect editorial perspective, not raw score order. Last refreshed 2026-05-03. Score data sourced from MyAnimeList community ratings via the Jikan API.
Sci-fi anime has always been comfortable asking big questions with strange premises. Time travel, galactic warfare, post-human consciousness, alien contact — the genre uses speculative science as a lever to get at things that are hard to examine directly: determinism, free will, what makes us human, what happens when technology outpaces ethics.
The best sci-fi anime do the intellectual work honestly. The premise has internal rules that hold under pressure; the characters are changed by the technology around them rather than just operating it; and the speculative element connects to something emotionally real. A time-travel story is only as good as what the characters are willing to risk to change.
This list is ranked by MyAnimeList community score across every sci-fi-tagged anime on the site, with editorial blurbs on the top 10 explaining why each one earns its spot. Seasons and films are treated separately the way MAL treats them.
- 1
Steins;Gate
2011 · 24 eps · Score: 9.07
Steins;Gate tops the sci-fi list with a 9.07 — a time-travel story built around a microwave that sends text messages to the past, which sounds absurd until the show reveals exactly how seriously it intends to take that premise. The first half is a slow character-building comedy; the second half is one of the most emotionally relentless stretches in anime. The science fiction scaffolding is there to make the human stakes feel impossible and inevitable at the same time.
- 2
Gintama: The Very Final
2021 · 1 ep · Score: 9.05
Gintama: The Very Final earns its 9.05 in a franchise that treats its sci-fi setting — feudal Japan occupied by space aliens — as a sustained joke that happens to also be structurally coherent. The film's final act is as emotionally direct as the series ever gets, and the sci-fi backdrop makes its themes about loyalty and obsolescence land with unusual weight.
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Gintama Season 4
2015 · 51 eps · Score: 9.05
Gintama Season 4 (9.05) is where the alternate-history alien-occupation premise gets used most seriously, with the Shogun Assassination arc treating Edo's political situation as a genuine threat rather than comedy backdrop. The sci-fi elements that the show played for laughs for years suddenly have consequences, and the audience felt the shift.
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Legend of the Galactic Heroes
1988 · 110 eps · Score: 9.02
Legend of the Galactic Heroes scores 9.02 across 110 episodes of political and military sci-fi that treats galactic warfare as a chess game between ideologies rather than a spectacle of battles. Yang Wen-li and Reinhard von Lohengramm are among the most intellectually written protagonists in anime, and the show's patience for long-form consequence is unmatched in the genre.
- 5
Gintama Season 2
2011 · 51 eps · Score: 9.02
Gintama Season 2 earns 9.02 and continues the series' unique achievement: a sci-fi comedy that uses its alien-invasion premise mainly for parody but has enough internal consistency to pivot to genuine drama whenever it needs to. The balance is harder to maintain than it looks, and this season manages it across 51 episodes.
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Gintama: Enchousen
2012 · 13 eps · Score: 9.02
Gintama: Enchousen (9.02) packages some of the franchise's best standalone genre parodies — many of them directed at sci-fi tropes — alongside the setup for the darker later arcs. It's the season that best demonstrates Gintama's range within a single cour.
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Gintama Season 5
2017 · 12 eps · Score: 8.98
Gintama Season 5 (8.98) is the Silver Soul setup arc, where the alien threat that was always background decoration becomes the actual plot. It's the payoff for years of worldbuilding treated as comedy, and the community rewarded it accordingly.
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Gintama
2006 · 201 eps · Score: 8.93
The original Gintama series (8.93, 201 episodes) is where the sci-fi premise was established and then immediately undermined for comic effect — aliens showed up, conquered Japan, banned swords, and then largely faded into background bureaucracy while the actual characters dealt with debt and odd jobs. It's one of the genre's more original conceits.
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Code Geass: Lelouch of the Rebellion R2
2008 · 25 eps · Score: 8.92
Code Geass R2 earns 8.92 as a mecha-political sci-fi that treats its alternate-history premise with genuine seriousness. Lelouch's Geass — the power to give one absolute command — is used with escalating cleverness, and the finale remains one of the most discussed endings in the genre. The sci-fi is the delivery mechanism for a story about power, sacrifice, and whether the end justifies the means.
- 10
Gintama: The Movie: The Final Chapter: Be Forever Yorozuya
2013 · 1 ep · Score: 8.89
Gintama: The Movie: The Final Chapter (8.89) uses time travel — the most sci-fi Gintama ever gets mechanically — as both a comedy engine and an emotional one. Gintoki encountering a future he failed to prevent is as affecting as the franchise gets, and the time-travel logic is internally consistent enough to take seriously.
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