One Line: Letters and Codes Achievements Here is the full list of all 10 One Line: Letters and Codes 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 10 CardsComplete 10 levels 20 CardsComplete 20 levels 30 CardsComplete 30 levels 40 CardsComplete 40 levels First pieceReveal 1 piece of the letter 10 piecesReveal 10 pieces of the letter 20 piecesReveal 20 pieces of the letter 30 piecesReveal 30 pieces of the letter Read the LetterReveal all pieces of the letter Love LetterRead the real letter