Operation Eventide game cover

Operation Eventide CD Key

An Arbiter, a superhuman angel-warrior, fights moon-demon Aberrations. Adelle Krouve must destroy the final threat, but five years later awakens in a damaged replica with unknown motives. Beautiful hand-drawn visuals, 100+ CGs, multiple endings, lovable heroines, and an enhanced release with new story arcs.
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Current Lowest Price

14.99$
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Release Date

17 Sep, 2026

Publisher/Developer

kolulu

Reviews

Steam: 100.00% positive (22/22)
Metacritic: -

Operation Eventide Steam Price History Chart

Current Steam price: 14.99$
Lowest Steam price ever: 11.99$ — 2026-09-24
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Operation Eventide description

Operation Eventide

In a world where celestial conflicts fuse science and sorcery, Arbiters are elite, superhuman soldiers who manifest their souls to become angels of unmatched strength. They stand as humanity’s premier defense against Aberrations—tyrannical demons that descend from the moon and leave devastation in their wake. At the center of this struggle is Adelle Krouve, a self-proclaimed hero whose resolve drives her to confront the last Aberration: a ruthless steel hydra known as Edge Ixia Atlas SeigaRozen.

Five years after sealing the beast, Adelle awakens in a body that is not her own—a shabby mechanical replica with only fragments of her human essence remaining. The scientist who rebuilt her with advanced, living machinery refuses to share why she was rebuilt, leaving Adelle to navigate a new existence where identity and purpose are questioned at every turn. As she presses forward, the mysteries deepen and the fate of both Arbiters and the world hang in the balance.

  • Stunning hand-drawn art with dynamic character sprites and a library of over 100 full-color CGs to discover.
  • Branching narrative with multiple endings determined by your dialogue choices and the paths you pursue.
  • Rich cast of heroines who balance strength, charm, and a touch of lovable madness, each with their own secrets and arcs.
  • Replayability and gallery features including an unlockable gallery, a replay mode, and a music room to relive and savor moments you love.
  • Enhanced definitive release delivering an expanded experience with new story arcs and bonus content that deepen the world and its conspiracies.

Explore conspiracies that unfold through dialogue, choices, and relationships as you uncover the truth behind Adelle’s rebirth and the chains that bind the Arbiter order. The fate of Edge Ixia Atlas SeigaRozen, the integrity of the Arbiters, and the future of humanity converge in a story-driven journey where every decision shapes the ending you reach.