Yes, I'm participating in my first month-long blogging challenge. Tedankhamen's Non-D&D OSR blogging fiesta. I'll be posting mostly this month about games other than D&D or Chanbara, although I may find some time for some updates there, too, since I've already prepared some posts for some days.
So let's get down to the first question:
1 What was the first roleplaying game other than D&D you played? Was it before or after you had played D&D?
Star Frontiers, TSR's sci fi game, was the first non-D&D game I played. There were ads for it in the back of the Endless Quest books and the back of the Mentzer Basic set, so I got it around 1986 or so. It was pleasantly different from D&D, being a “skill” game rather than class/level based in addition to the sci fi setting.
One other big difference with D&D was that it came with the 1/2 inch counters and maps. This made our games somewhat more boardgame-like at times, since all we really needed to have fun were some stats for aliens or enemy agents, and just throw counters down on one of the maps. It made for a lot of quick, simple games, but I didn't keep a lot of the notes, which is a bit of a shame.