Stellar Blade became rather controversial with critics in large part due to the sexualization of its protagonist Eve. They argued that the game's marketing leaned heavily into Eve's sexual appeal by focusing on elements such as revealing costumes and suggestive character designs for its promotional strategy. This got to the point where the South Korean version of the game received an "Adults-Only" rating due to suggestive images, nudity, and violence. Hyung-Tae Kim, the game's director, defended these design choices, stating:


This controversy culminated when the game released with a Day 1 patch that patched out unintentionally offensive graffiti, and censored two revealing outfits Eve can wear in the game, the Holiday Rabbit and the Cybernetic Bondage, but these are not the only censored outfits left in the game. When the player finds their first unlockable Nano Suit blueprint on the overworld, a tutorial pop-up appears featuring a video that scrolls through a montage of the other Nano Suits you can unlock in the game, and among them is an uncensored version of the Moutan Peony, an outfit that features dark pantyhose covering Eve's skin up to her waist in both the base game and the Day 1 patch. It appears that the developers forgot to remove this video when changing the costumes during development, and it's currently not known if other outfits in this video were changed in the final game.

These changes are in contrast to a claim from the game's official Twitter account stating that all versions of the game worldwide would be released uncensored, leading to the changes being widely criticized by players on social media and speculation that the game's publisher Sony Interactive Entertainment mandated the changes after addressing the offensive graffiti. However, Kim addressed the matter during a Q&A at a launch event for the game, stating:


The speculated tensions between Shift Up and Sony during development were actually highlighted by Drakengard and Nier: Automata creator Yoko Taro, a developer with a history of tensions with Sony, during a joint interview with him and Kim for IGN published a little over a week before the game's release: