The Square Key Achievements Here is the full list of all 20 The Square Key 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 FirstComplete the first level of the game. SecondComplete the second level of the game. ThirdComplete the third level of the game. FourthComplete the fourth level of the game. FifthComplete the fifth level of the game. SixthComplete the sixth level of the game. SeventhComplete Level 7 of the game. EighthComplete the eighth level of the game. NinthComplete the ninth level of the game. TenthComplete Level 10 of the game. EleventhComplete Eleventh Level of the Game. TwelfthComplete Level Twelve. ThirteenthComplete level 13 of the game. FourteenthComplete the fourteenth level of the game. FifteenthComplete the fifteenth level of the game. SixteenthComplete sixteenth level of the game. SeventeenthComplete seventeenth level of the game. EighteenthComplete the eighteenth level of the game. NineteenthComplete nineteenth level of the game. TwentiethComplete Twentieth Level Game.