Just when the world was close to reviving itself after a devastating war, a deadly epidemic known as the "Yellow Zombie Virus" begins to emerge. Said virus drives Mobile Civilians mad and turns them into mindless berserkers, forcing survivors to hide themselves in fortified cities, dividing the world into three countries; Shu Area, Wei Area, and Wu Area. Three warriors Liu Bei Unicorn Gundam, Guan Yu Nu Gundam and Zhang Fei God Gundam meet each other and decide to work together to save the world.
The net anime started airing in July 26, 2019, directed by Takahiro Ikezoe (Sword Gai: The Animation, Show by Rock!!), with a new episode scheduled to release on "the 4th Friday of every month". There's also two comic series, both released in April and available on the official website. One is titled "SD Gundam World Sangoku Soketsuden: Soshoki" (Drawn by Luk Mo Shek and launched on April 10. Also serialized in Explorer Publishing's monthly Hong Kong magazine Lucky.), while the other is "SD Gundam World Sangoku Soketsuden: Enkotan" (Drawn by Naoto Tsushima, and launched on April 19). Soshoki focuses on Cao Cao Wing Gundam, while Enkotan focuses on Sun Jian Gundam Astray, and Takuya Yamanaka is in charge of the story for both comics.
Tropes associated with SD Gundam World Sangoku Soketsuden are:
- Alternate History: This tale is based off of a classic Medival-Chinese War-Story, yet the setting seems more akin to modern-day cities.
- Alternate Universe: Romance of the Three Kingdoms already got adaptated for the SD Gundam franchise with Sangokuden. However, both Sangokuden and Sangoku Soketsuden are completely separate from each other. This can be easily told by the characters, who portrayed by different mechs than in Sangokuden (For example, Liu Bei is played by the original Gundam in Sangokuden, whereas in Sangoku Soketsuden, he's played by the Unicorn Gundam).
- Anime Hair: Despite being a mecha, Liu Bei has this in a great big fan-like topknot.
- The Berserker: Liu Bei's Newtype Destroyer mode turns him into this. When active, he attacks any enemy in sight and often needs someone to knock him out of it, as shown in episode one of the anime and Enkotan.
- Carry a Big Stick: Much like the mobile suit he's based on, Ma Chao Barbatos Gundam carries a massive club as a weapon.
- Curb-Stomp Battle: Happens in the second chapter of Soshoki. Cao Cao Wing Gundam and his group were given one by Lu Bu Sinanju and Zhang Liao Sazabi under orders from Yuan Shao. This battle ends with Cao Cao's first defeat and the loss of Xiahou Dun's eye.
- In Medias Res: The Soshoki manga is told this way. It opens up with Cao Cao Wing's attack on Yuan Shao Red Warrior before flashing back to Cao Cao's past.
- Mood Whiplash: A staple of Enkotan. It's common to have it be lighthearted and comedic one page, then someone gets attacked or assassinated on the next.
- Recycled In Space: BB Senshi Sangokuden is already Romance of the Three Kingdoms with SD Gundams and other MS, but Sangoku Soketsuden adds Zombie Apocalypse on top of that and takes place in a futuristic setting.
- Robot Hair: By lieu of everyone being based off of Giant Mecha, a number of characters possesses this. Guan Yu Nu Gundam even has a Robot Beard.
- Shout-Out: To another Sunrise creation; it's subtle but the tiger-themed Sun Jian Gundam Astray seems to have taken some design cues from a combination of the lion-themed Genesic GaoGaiGar and Guy Shishioh, especially with regards to the red-gold-black armor, clawed feet, and fiery hair.
- Sacrificial Lion: Zhao Yun, a close friend of Liu Bei, dies in the first episode in a zombie attack, serving as the catalyst for Liu Bei to find a way to beat the Yellow Zombie Virus and save the world.
- Turns Red: Liu Bei, much like the mobile suit he's based on, goes into his Newtype Destroyer mode when he's angry, causing him to glow with red energy.
- The Virus: The "Yellow Zombie Virus"note , which causes the victims to lose themselves and start attacking people.
- Volcanic Veins: The pattern on Dong Zhuo Providence Gundam's armor.
- We Hardly Knew Ye: In the Enkotan manga, Liu Bei Unicorn's mother. She's introduced in the first chapter only to sacrifice herself at the end to save her son from a Yellow Zombie Virus horde aerial ambush. Then in the next chapter, she solidifies her fate by cutting the ropes on the bridge to allow Sun Jian and her son to escape.