Walls that Watch Achievements Here is the full list of all 7 Walls that Watch achievements.Filter Achievement View View Image viewList view Sort 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 Master IBeat all the basic Levels. Master IIBeat all the Challenge Levels. Ultimate MasterAchieve the maximum possible score in the Custom Level. Why..? %*£! Pure StealthBeat all the Challenge Levels without using the Energy Pulse. Master IIIAchieve a score of 8000 or higher in the Custom Level.