Starro the Conqueror, or simply Starro, was a gigantic, starfish-like extraterrestrial that was captured and imprisoned in Jotunheim on Corto Maltese and the primary subject of Project Starfish. During its imprisoned years, Starro was tortured by the hyper-intelligent scientist Gaius Grieves. It was ultimately contained and brought to Earth, where the United States government, hoping to weaponize it, made a deal with the government of Corto Maltese to imprison and conduct experiments on it entitled "Project Starfish" in Jotunheim, where it was experimented on by geneticist Gaius Grieves, who dubbed him "Starro the Conqueror". For a full 30 years, Thinker took it upon himself to physically, and mentally 'study' Starro, which he claimed were necessary for scientific advancement.

Thinker brought you into the containment area. You could see several caged humans with strange spores on their faces. Grieves conducted multiple experiments that involved acts such as forcing it to generate multiple spores that controlled journalists, political rivals of the Herrera family, and their loved ones, who were similarly tortured and killed by the spores. You could hear the multiple people speak at once.

"Have you come to save me from that madman? Thirty years he's kept me here, tortured me, had his way with me!" The people all spoke in unison, but you could hear the pain in their voices.