Talk:Stalker/@comment-68.35.41.76-20130629202755/@comment-70.82.34.181-20130701144619

Why not test your luck with this theory?

"Bringing a low ranked equipment or using a low ranked frame may increase the Stalker's appearing chance. (Needs confirmation)"

I seem to have had a higher chance of making it appear when I was leveling up weapons and my new warframe as well. It could simply be luck, but it doesn't hurt to try, as long as you have one thing strong enough to defeat him.