Not Not 2 - A Brain Challenge Achievements Here is the full list of all 26 Not Not 2 - A Brain Challenge 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 The BeginningComplete the first level The BasicsComplete all levels from The Basics world The EmptyComplete all levels from The Empty world The ColoristComplete all levels from The Colorist world The LogicalComplete all levels from The Logical world The ColorblindComplete all levels from The Colorblind world The GeometristComplete all levels from The Geometrist world The ImpossibleComplete all levels from The Impossible world The Missing DoorComplete all levels from The Missing Door world The RainbowComplete all levels from The Rainbow world The ExperimenterComplete all levels from The Experimenter world The EmpathComplete all levels from The Empath world The ElephantComplete all levels from The Elephant world The ChallengerUnlock a challenge level The OlympicsComplete 8 different challenge levels with at least one star The MatrixFinish the Ultimate Survivor challenge level with at least one star The EnduringPlay a daily or weekly level 3 days in a row The PerseveringPlay a daily or weekly level 7 days in a row The StarCollect 50 stars The Night SkyCollect 100 stars The Milky WayCollect 150 stars The MoneyEarn 500 diamonds The CollectorUnlock 10 characters The ImmortalDie a hundred (100) times The SupersonicReach the best reaction time under 100ms The LightningReach the best reaction time under 50ms