Starting off as 4koma and published online to promote the titular Transformers Legends toyline, with special Bonus Edition (出張版 Shutchōban) chapters of the comic packed with the toys themselves, it Initially showcased the misadventures of the Beast Wars cast re-imagined as adult Transformers fans, before eventually taking a more story-driven approach and attempting to connect all the entries of the Japanese Generation 1 anime and manga continuity into one storyline. 

Heavily marketed towards adult collectors and otaku in the face of the brand's dwindling popularity with children after TakaraTomy's largely unsuccessful first attempt in the mid-2000s, it attempted to change the image of the Transformers franchise, with much more "adult", often ecchi-filled humour and numerous references to fan culture.
 
Ulltimately concluded when TakaraTomy began a brand unification with Hasbro starting with Power of the Primes, deciding to mainly sell Hasbro toys as is with minimal changes to packaging. It was eventually succeeded by the more action-oriented Generations Selects Special Comic promoting Hasbro and TakaraTomy's joint Generations Selects imprint. (Source: TFwiki, edited)

Fleeing from the war that has raged on the planet Cybertron for millions of years, the heroic Autobots led by Optimus Prime encounter a surprise attack by the evil Decepticons led by Megatron. The ensuing melee aboard the Autobot ship ends when the ship crashes on a volcano. Four million years later, an earthquake reactivates the ship`s computer and resurrects both the Autobots and Decepticons, resuming the great war of the Transformers. 
(Source: AniDB)

Set in 2025 A.D., Transformers Victory introduces Star Saber, the mightiest Cybertron warrior and the greatest swordsman in the galaxy. The Destrons are continuing to invade planets throughout the universe, so the Cybertrons have joined with the humans to form the Space Defense Force, with Star Saber as its leader. Leading the Destrons is Deathzaras, who has targeted Earth as the next planet to plunder...
 
(Source: Anime News Network)

In the distant future, an evil entity known as Violenjiger resurrects nine of the most feared generals in Destron history. While saving some inhabitants of a planet destroyed by these Destrons, Cybertron leader Victory Saber is seriously damaged. The leadership of the Cybertron forces is passed on to the heroic robot Dai-Atlas. Together with Sonic Bomber, Dai-Atlas must protect a mysterious crystal on Earth known as the "Zodiac" from falling into the hands of Violenjiger.
 
(Source: Anime News Network)

Headmasters starts with Galvatron leading a new batch of Destrons to wage war on Seibertron, the Destron Headmasters. The Cybertrons are rescued by the arrival of the Cybertron Headmasters, led by Fortress (Cerebros, the head of Fortress Maximus). It is revealed that Fortress left Seibertron millions of years ago in search of energy, and have finally managed to come home. He explains that the Headmasters are from a planet called Master; the human-sized robots who live there built themselves Transformers-sized bodies. They can then transform themselves into the heads of the robots, and have now joined the Cybertron-Destron war.
 
(Source: Anime News Network)

Even though the Destrons have been driven off Earth, a small team of Cybertron Pretenders have remained behind, just in case. Led by Metalhawk ("Hawk" in his human identity), the Pretenders live among the humans, using their Pretender shells to assume human size and appearance. The Cybertrons' caution is rewarded: Destron Pretenders soon appear, led by a mysterious force called Devil Z. The Cybertrons and Destrons soon build up their forces, recruiting humans to become Junior Headmasters and Godmasters (Powermasters).
 
(Source: Anime News Network)

An evil race of transforming robots known as the Destronger make their appearance known by invading a world exposition in New York and abducting Professor Onishi, a renowned scientist. The professor's son Yuuki befriends Fire Convoy and the heroic Cybertron forces, who will stop at nothing to rescue the professor and protect Earth from the wrath of Gigatron and his Destron henchmen.
 
(Source: Anime News Network)

As 2006 settled in, Earth had been rendered completely devoid of Transformers, and the rebuilding of Tokyo was underway. However, Galvatron's impact was revealed to have had a much greater effect than anyone could have predicted&mdash;the blast caused by his impact had scattered his Unicron-empowered cells throughout the planet's atmosphere. When they came into contact with other animals and objects, from marine life to cars, they fused with them, becoming one of many monstrous creatures referred to as Legion. This catastrophe also created the means to defend the world against the Legion, however&mdash;when Galvatron's cells came into contact with human beings, they also become able to fuse with other entities containing his cells by kissing them. With their Autroopers being the perfect candidates for this "ParasiTech" fusion process, the EDC began recruiting and training these "Kiss Players" as combat squads to battle the Legion. 
(Source: Transformers wiki)

Beast Wars II tells the story of a battle waging between Lio Convoy's team of Cybertrons (Maximals) and Galvatrons army of Destrons (Predacon) on the planet Gaia. As LioConvoy and Galvatron fight over the mysterious energy source known as Angolmois energy, many strange occurrences and mysterious properties of Angolmois begin to arise.
 
(Source: Anime News Network)

Tie-in manga for the 2007 Transformers: Animated cartoon, serialized in Kerokero Ace. While occasionally retelling events from the show, it often deviates from its plotline, being treated as a continuation to the live-action movie series by Michael Bay instead of a standalone entry, and often featuring spotlights for characters whose toys were released exclusively in Japan.
 
Note: Chapter count includes three extra chapters published after its initial run concluded, which were not collected in a tankoubon release. Those chapters were labelled "The Cool Extra (ザ・クール・エキストラ)" and often adapted plotlines from the show that Tsushima initially omitted.

On the mechanical planet of Cybertron live super robotic organisms known as Transformers. There, mainly consisting of convoys, the Cybertron army, and their old enemy Destron fell into conflict to gain hold of a new power to join their side. A new breed of Transformers known as the Microns. But, grieving over the battle the Microns set off to the other end of the universe. 4 million years later, on Earth, 3 young children activated a mysterious panel inside a cave. And somehow, that was the dormant Micron...

In 2004, G1 Convoy is alerted to a disturbance: an attack by a tyrannosaurus rex calling himself Beast Megatron! Cybertrons and Destrons from across the eras have converged on this time to clash over the newly-discovered energy source - solitarium!
 
Note: Released on DVDs packed in with select Robotmasters figurines.

A series of tie-in manga for Takara's Transformers Unite Warriors figurine series, focusing on the Combiners.

Tie-in manga for Hasbro and Takara's Kre-O blocks Transformers product line. The story follows various comedic shenanigans involving Transformers Kre-O sets and figurines, at times retelling the events of Transformers Generation 1 anime's episodes.
 
Note: Chapter count includes a prologue chapter and a special chapter included in the product catalog.

A manga about the light-hearted misadventures of the Autobots and Decepticons in a setting strongly resembling the original Generation 1 cartoon for a young audience while also promoting various exclusives aimed at older collectors. The web comic additionally inserts character profiles calling out the specific toy being advertised in each issue. 
 
(Source: TFwiki, edited)

Through the machinations of Tarantulas, NAVI-ko is "warped" into a body of her own, which transforms into a dolphin. She debuts her new form to the bemused Megatron as she presents him information (secretly provided by Tarantulas) on "Nemesis Prime", an evil clone of their ancestor, Optimus Prime. Megatron wants to add Nemesis Prime to his own forces, so he sends NAVI-ko back in time via a transwarp portal to Doctor Arkeville's Decepticon Base in Yokohama, Japan, in the year 2014 where Nemesis Prime has been detected. 
 
Note: Tie-in manga released online to promote the 2014 Transformers Expo in Yokohama. 
 
(Source: TFwiki)

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