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To play this content, you must own the game's main program Aeons Echo on Steam.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Social Deduction Fest ends
Official stores with direct support.
This is the base game required to play this DLC. Other expansions may also be required.
※If you want to use this content, you must own the full version of the game.
※Limited to one purchase per account.
※ DLC is non-refundable
Sphinx x1
Star Key x 5
Audio & text: Japanese
Text only: English, French, German, Spanish - Spain, Simplified Chinese, Korean
