Treasure created a story mode for Radiant Silvergun when they brought their shooter from arcades to the Sega Saturn. Gonzo, the animation studio behind the Lunar cutscenes and a decade later Afro Samurai, created cutscenes for Radiant Silvergun starring a R2-D2-like robot.
And that’s the content the ESRB had qualms with, apparently.
This is an action game in which players pilot spaceships to defend Earth from impending destruction. As players fly through each vertically scrolling level, they use specialized guns (e.g., Vulcan, Homing, Spread) to shoot lasers at waves of futuristic aircraft and robots. Battles are accompanied by colorful light effects and brief explosions. During one animated cutscene, a character is punched in the face, resulting in a brief spurt of blood; this character is later depicted on the floor with a small pool of blood under his head. Another cutscene briefly depicts two human clones (both male and female) that appear to be nude, though no details (i.e., nipples or genitalia) are shown.
Not mentioned by the ESRB are features like online cooperative play, replay sharing, and upgraded graphics.
I think I know what scene the ESRB is talking about. Without spoiling anything, did you pay attention to the mannequin-like characters or the story?