Hidden Boxes Achievements Here is the full list of all 6 Hidden Boxes achievements.Filter Achievement View View Image viewList view Sort by Won first then by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply AllWonNot wonScanUse scan ability five times 22 July 2024 - Add a guideInvisibilityUse invisibility ability five times 22 July 2024 - Add a guideProp WinnerWin 5 matches as prop 22 July 2024 - Add a guideWhistleUse whistle 10 times 22 July 2024 - Add a guideSeeker WinnerWin 5 matches as seeker 22 July 2024 - Add a guideMatchesPlay five matches 22 July 2024 - Add a guide