Isn't it just click to sprint? funny i'm at work and can't remember the control scheme exactly despite playing so much.
But i'm quite sure its not required to be held down.
As for the mastery challenges, they have all been very easy for me so far. Just grab your highend frame/gear
Wait, its click to sprint? Not hold down? Ugh. I was trying to find the controls online, is there an image or something? More times it's just PC-centrick descriptions.
Is there an alert schedule or are they random? It is really hard to plan my life around random events ....