Nokia N-Gage for sure, been buying the stuff like crazy, 24 titles to go for completion.

ASM (Aktueller Software Markt), German 80s/90s gaming mag (approx 120 issues for the whole run). . I have the first years run (86/87), but moving to UK prevented from continuing.
Now back in Germany I am trying to pick up the remaining issues About 50 issues to go for completion.

I was on a LucasFilm/Arts collectors bug but wow, that stuff is still in demand, even on Ebay. Put that on hold for now.