Extreme Reaction Achievements Here is the full list of all 4 Extreme Reaction 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 100msReaction time less than or equal to 0.1s 150msReaction time less than or equal to 0.15s 200msReaction time less than or equal to 0.2s 250msReaction time less than or equal to 0.25s