Post Cards Achievements Here is the full list of all 3 Post Cards 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 OceanBeat the ocean card. DesertBeat the desert card. GroveBeat the grove card.