Steam: What is the Mysterious Badge For? - Overmental

If you've checked your Steam Badges page recently, you might have noticed a weird new addition at the top: the "Mysterious" badge. Don't worry, you're not
If you've checked your Steam Badges page recently, you might have noticed a weird new addition at the top: the Mysterious badge. Don't worry, you're not going crazy, they appeared earlier this month

Steam Summer Adventure 2014 Badge Level 1 Crafting - Mysterious Card Badge

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Steam Community :: Guide :: Steam Badges Collection

UNLOCK a SECRET STEAM BADGE - STEAM CUP 2022 ⚠️

Scientific Antiques For Sale, Buy Online

Steam 'Mysterious Badge' Trading Cards Are Now Available

Seasonal Badges haven't been updated in 6+ months. Why? : r/Steam

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Temple of Solomon The King