Is 30th Gundam Perfect Mission hentai?
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

OVA · 2009 · 1 episodes · G - All Ages
Mecha, Sci-Fi
30th Gundam Perfect Mission is a short original video animation (OVA) officially released by Sunrise in celebration of the 30th anniversary of the Gundam metaseries. It features all the titular and mascot gundams of the main series in a non-cannon conjoint mission. (Source: Gundam Wikia)
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