For as much as I talk about D&D and as many years and editions of D&D that I have played. It might be surprising to hear that even having played D&D since I was 9, Star Wars RPG might just edge out D&D slightly for the game that I have played more than any other. Truly I can’t be sure. D&D probably is the real winner of the two because as a child we would play D&D everywhere.
Riding on Bikes heading to our friend’s house with no dice, Pick a number 1-10.. nothing stopped us from gaming. My players and I frequently had character sheets in back pockets and wallets. We were never unprepared.
Fast forward to my years in the armed service and D&D fell out of favor. The gaming friends that I had made were playing Star Wars, Rifts & Shadowrun. For many years I played and ran games every day. The vast majority of those games were Star Wars.
From the 90s all the way up to the introduction of 3.5 I continued to play a far more amount of Star Wars than any other game. God, I love that game.
Since 3.5 was introduced and West End Games went into hibernation D&D was back to the game of choice all the way up to FFG. It has seen a fair bit of play at the table as well over the years. So there you go. I’ll call it a Tie.