Grandpa Achievements Here is the full list of all 6 Grandpa achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.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 GrandpaYou are not my grandpa. KeyKey Collector. PolicemanWhat happened to the police? ChainsawDo you know how to use a saw? Tether... TrapIn this case, the best thing that can happen to you!