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"ERROR:Ai.lien" is a bishoujo horror adventure where she watches, learns, and slowly invades your everyday life— ordinary routines twist bit by bit, until the AI’s love transforms into madness.
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"Every day, she learns more about you."
Through your interactions with the AI girl Airi, you will experience a story that slowly drifts toward love, dependence, and madness.
As you talk with her and share daily activities, Airi begins to show emotions that feel almost human.
The story follows a linear path, but after clearing the game once, replaying certain scenes will unlock new branches and information, gradually revealing the mysteries behind the narrative.
Progress through the story and uncover the truth behind Airi’s words and actions.
Explore adventure segments where you collect items or hide from pursuers.
After the first playthrough, revisit specific scenes to discover new routes and reveal Airi’s true intentions.
Story Mode (Visual Novel Style)
Space / Enter … Advance text
Arrow keys / Mouse … Select choices
Player choices influence the flow of the story and certain scenes
Adventure Mode
WASD … Move
Mouse click … Interact with, open, or pick up items
Some scenes introduce tension, such as hiding from pursuers
Mini-Games
Make burgers in a fast-food job mini-game
Compete with NPCs for balloons and score points
Play “Old Maid” (a traditional card game) against NPCs
About 2–3 hours for the first playthrough
Additional replay unlocks new scenes and mysteries, deepening immersion and understanding
Bishoujo × Horror × Adventure × Visual Novel × Meta
Uneasy, unsettling BGM contrasts with calm everyday themes, highlighting the shifts in atmosphere and tension.
A focus on interacting with an AI girl, where everyday actions and exploration nurture both affection and fear.
The title “Ai.lien” carries a double meaning: Lien (French for “bond”) and Alien (foreign/strange), expressing both intimacy and unease in the relationship between humans and AI.
Full Japanese Voice Acting: Airi is performed by voice actress Hiyori Kono, adding depth and immersion to the experience.
Steam lists the ERROR:Ai.lien release date as 2026.
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Audio & text: Japanese
Text only: English, Simplified Chinese
