Thursday, 5 November 2026

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iid Launches Free Steam Companion Service Game*Shelf

iid launched Game*Shelf, a free web service for Steam users, on November 5.

4 sources 45m ago

Reporting from 4 sources: Automaton, GameBusiness.jp, Inside, Game Spark.

Why it matters

The library value estimate is labeled a reference figure based on price data rather than actual purchase amounts, so the service reports spending without claiming to know it.

iid Launches Free Steam Companion Service Game*Shelf

Key Facts

  • iid launched the free web service Game*Shelf for Steam users on November 5.
  • Game*Shelf links to a Steam account and is not an official Valve or Steam service.
  • Game*Shelf sends notifications when a wishlisted title hits a target price, a new recorded low, or gains Japanese support, and supports Discord integration.
  • Game*Shelf hosts user-shared information on Japanese localization mods for games without official Japanese support.
  • Game*Shelf estimates library asset value from game price information and states the figure differs from actual purchase amounts.

The service links to a user's Steam account to organize owned games, manage wishlists, and visualize play status. iid operates the game media outlets Game*Spark, Inside, and GameBusiness.jp, and the service is a third-party tool, not an official Valve or Steam product. Game*Shelf lets users filter libraries by play status, genre, and custom tags, with bulk tag assignment. On the wishlist side, users set target prices per title and get notified when a target is reached, when the lowest price recorded by Game*Shelf is updated, or when Japanese language support is added. Notifications can route through Discord. It also carries a user-shared database of Japanese localization mods for games without official Japanese support, with a reporting function for incorrect entries. A separate screen estimates the library's asset value from list prices, and play time is aggregated by title and by genre.

Game*Shelf carries the concept phrase "You'll never be lost about which game to play next." Its dashboard opens on the number of titles registered in the library and the number of wishlist items, then suggests wishlist games that are heavily discounted, plus recommended titles based on wishlist trends. The catalog screen filters store titles on sale by genre and review rating.

  • Recommendation comments: a "spread the word" feature built on the format "If you played XX, we also recommend YY!", letting users post comments for people who played a specific title.
  • Personal memos: a private memo function for recording impressions of games.
  • Social sharing: users can share play time and favorite titles on social media.
  • Wishlist sorting: the wishlist can be sorted by release date and other criteria.
  • Early Access total: a figure that sums the prices of owned titles currently in Early Access.
  • Store filtering: the Games screen filters titles on sale in the store by various factors.
  • Japanese support filters: any screen can be filtered by whether a title supports Japanese display and by whether a user-shared localization mod exists.

The asset value figure is a reference value based on game price information, and the service states it differs from the actual purchase amount.

Written with AI by Yomimono from the 4 cited sources below, including Japanese-language reporting where cited. See our editorial policy.

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