Aiyoku no Eustia
by AUGUST
About Aiyoku no Eustia
Aiyoku no Eustia is an adult adventure game by AUGUST, built with the Others engine and 2D CG artwork. You play Caim Astraea, a freelance former assassin living in the lowest layer of the floating city Novus Aether. The world began after God withdrew the Angels and Chaos covered the earth, while the last Saint Irene saved a city by lifting it into the sky. More than ten years before the story, an interrupted prayer caused the Gran Forte, breaking the lower city apart. Caim takes odd jobs and avoids killing, until a request leads him to a girl afflicted by a wing-spreading disease, and a light that recalls the disaster.
The game is an ongoing release, with version 2025-08-11 and original launch on July 29, 2011. It runs on Windows in English and includes censorship. It features a male protagonist, romance, and adventure, with adult content presented through its story and 2D CG scenes.
Developer's description
Five hundred years ago, angered by humanity's sins and arrogance, God recalled his Angels from Earth and the surface was consumed by Chaos. The last person who still prayed to God, the first Saint Irene, asked for his forgiveness. God listened to her prayers and lifted the city and land around her to save humanity from extinction. As the last bastion of humanity, the city of Novus Aether floats in the sky above the inhospitable surface, powered by the daily prayers of the Saint. More than a decade ago, due to the interruption of the prayer, the "Gran Forte" occurred, causing part of the city to fall to the surface and splitting the lower city in two. Spoiler In time, the lowest layer became the dwelling of all kinds of low-lives, people who lost much of their former lives during the "Gran Forte," becoming known as the "Prison." However, a contagious disease that causes people to grow wings has spread throughout the city. A special unit has been formed to deal with these people swiftly. In this "Prison" resides Caim Astraea, a freelance ex-assassin who does odd jobs for his friends for money, refusing jobs that require him to kill people. During one request, Caim finds a girl who contracts the wing-disease, enveloped in a light that reminds Caim of the "Gran Forte" years ago...
Aiyoku no Eustia screenshots
Download Aiyoku no Eustia 2025-08-11
Player reviews
What players say
Reviews are polarized: some praise story and translation, others criticize grimdark tone and weak writing.
Players like
- Long-awaited fan translation
- Strong reputation among VN fans
Common complaints
- Grimdark tone with relentless misery
- Story becomes disappointing as it progresses
Best for players who enjoy long-awaited AUGUST fan translations and emotional endings.
Summarised from 5 written player reviews.
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