Steam実績トラッカー is a free Chrome add-on developed by Gakuto1112. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This handy tool allows users to mark Steam achievements that they believe they can obtain and easily track them later.

Once installed, Steam実績トラッカー adds buttons to the achievements page on Steam. These buttons allow users to mark achievements as either attainable or unattainable. Please note that these buttons only appear when logged into an account and on that account's achievements page.

Marked achievements, whether attainable or unattainable, can be conveniently accessed and reviewed at any time through the extension's pop-up. Use this feature to stay motivated and work towards achieving your marked goals!

Furthermore, the data of marked achievements can be imported and exported, allowing for quick and seamless transfer of achievement data.