Portal: Lost in Aperture Achievements Here is the full list of all 5 Portal: Lost in Aperture 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 Normal RouteThis is impossible to get, it is only for counting the different routes. Backrooms RouteThis is impossible to get, it is only for counting the different routes. Scary RouteThis is impossible to get, it is only for counting the different routes. The Chell Parable RouteThis is impossible to get, it is only for counting the different routes. Tank RouteThis is impossible to get, it is only for counting the different routes.