Originally Posted by rikschennink
Do you mean lowering the price in stages till it's free?
About duration, I read you should at least keep your game free for a period of 4 to 5 days.
Yeah, see this post
by @Tannorexic. What we'll probably do is lower the price in stages, holding in there for a week at a time until it becomes free - and leave it free for another week.