Underland Achievements Here is the full list of all 30 Underland 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 Looking for UnderlandLevel 1 completed DiggingLevel 2 completed The AcidLevel 3 completed TNT Booom!Level 4 completed The PlumbingLevel 5 completed Work toolsLevel 6 completed The GateLevel 7 completed PlumberLevel 8 completed The way ZLevel 9 completed CannonsLevel 10 completed Dynamic platformsLevel 11 completed Cheese soilLevel 12 completed Underground structuresLevel 13 completed The valley of deathLevel 14 completed The boxLevel 15 completed DeepLevel 16 completed Inclined planeLevel 17 completed The bridgeLevel 18 completed TNT boxLevel 19 completed Acid poolLevel 20 completed PropellerLevel 21 completed 2296 feet deepLevel 22 completed 2624 feet deepLevel 23 completed 2952 feet deepLevel 24 completed 3280 feet deepLevel 25 completed 3608 feet deepLevel 26 completed 3937 feet deepLevel 27 completed 4265 feet deepLevel 28 completed 4593 feet deepLevel 29 completed End of the lineLevel 30 completed