Jinki:Extend's opening animation is a direct Homage to the opening for the first Mobile Suit Gundam series (0079), and there are certain Gundam-style visual cues in the mecha battles. The series also included various homages, either in the form of characters, or visual cues to several other mecha series: Neon Genesis Evangelion, Martian Successor Nadesico, even Destiny of the Shrine Maiden.
Due to this, it is difficult to say much about the series beyond the fact that its humor lies in its complete lack of originality. Jinki:Extend might not be the "Every Mecha Show Ever" series, but it certainly hits the major ones.
A Visual Novel re-imagining of the series titled Jinki:Extend Re:Vision was released in 2010 by Giga. It is an eroge, however, so that's pretty much all that can be said about it on this wiki. There is also the Darker and Edgier sequels, Jinki - Shinsetsu, Jinki - Shinsetsu - Final Episode and Jinki Extend Relation, which is on hiatus after 5 volumes. A Visual Novel sequel to the original manga's Complete Edition, Jinki Resurrection, is set to be released in March of 2020; it, too, is an eroge. Not to be confused with Jinrouki Winvurga, his other work.
Jinki:Extend provides examples of:
- Alternate Continuity: The Re:Vision visual novel is a retelling of the Extend manga, with Canon Foreigner Akira as the player character and manga protagonist Akao being reworked into the main heroine.
- Anachronic Order: The anime version alternates between two main story arcs set in 1998 and 2002, and also has occasional flashbacks / flashforwards to events happing elsewhen.
- Expressive Hair (more specifically, Rui's hairclips, which look like crab pincers, can pince)
- Groin Attack (In the manga, one of the female characters gets wounded over there when a large, mecha-sized blade penetrates her mecha's cockpit. She survives thanks to a rescue by her teammate.)
- Improbably High I.Q.: Elny, according to side materials, has an IQ of 300.
- Loves the Sound of Screaming: Kalis in the manga. He rants about how annoyed he is that one of the girls won't scream for him while he rapes her.