Cyan Brain Demo 81 Nekouji Studio -

is a decadent sci-fi side-scrolling action-horror game developed by Nekouji Studio (often stylized as NEKOUJI). Initially released as a series of experimental builds and demos, including the notable "Final Demo" in July 2025, the full game officially launched on DLsite in August 2025 and on Steam in December 2025.

: Failing a combat encounter or making poor choices leads to unique animated execution sequences and the collection of "Death Cards". Story and Setting

Cyan Brain combines fast-paced shooting with tactical survival elements. cyan brain demo 81 nekouji studio

: Successful hits trigger random, realistic blood-splatter effects. As the protagonist takes damage, her outfit progressively tears, reflecting her increasing vulnerability.

: Choices and battle outcomes lead toward multiple endings, ranging from resolute and triumphant to corrupted or tragic conclusions. Mature Content Warning Story and Setting Cyan Brain combines fast-paced shooting

: She is tasked with protecting a "divine fetus" coveted by a controlling, fanatical church in a world ravaged by a mechanical apocalypse.

While early builds like were shared via the Nekouji Studio Patreon , the most stable way to experience the game's polish is through the Steam store or the DLsite platform . Recent updates, such as Ver1.01, have focused on difficulty adjustments, map improvements, and fixing common bugs like frozen enemies or save-data loss. : Choices and battle outcomes lead toward multiple

: The game takes place in colossal ruins and research stations choked with deranged machines and grotesque aberrations.