Memory Test is an in-game achievement in Run 3.
This achievement can only be completed using the Child, as suggested by the picture. Simply follow the path of blacked-out tiles to the end. However, this is easier said than done, and you may take several tries to complete it. Try to memorize the path of tiles at the end of the level while you still have light.
Another strategy is to play the level backwards. To play a level backwards, you need to go to the pause menu and press and hold the previous level button. Make sure you have beaten the next level before you do this. When you do this, you will start at the very end of the level. There are two spawnpoints and only one makes it possible to not jump. There will be light as you start, and as the tunnel goes dark, you will still a an easy time getting this achievement because there is a giant patch of power tiles.