The Underpass Achievements Here is the full list of all 8 The Underpass 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 Welcome to Zone 10Escape through the exit in zone 10. DetectiveIdentify all anomalies. Change BlindnessMiss an anomaly. ParanoiaGo back when there was no anomaly. Welcome to [REDACTED] Wrong Number What Door? I believe I can fly