Mister Ster said:I can confirm ranking up twice with a class in one session will get you the achievement. I didn't post a guide or anything due to attitudes like Burials. If your aren't willing to give this a try, then it's your loss. Just saying I'm second to complete BF1 by doing this.
Ya some of us have lives and can't sit on a game for hours. It's not a.loss cause I'm not over exaggerating freaking out over achievements that will be fixed in time with a patch. No worries.
Obtained the shadows rushed me.