I went in having only played several hours of 2 and I was fine. You'll definitely miss out on some of the relationship feels from what I've been told but the game is stand alone and one of the best of the generation even if you've never played the originalsI'm looking at The Witcher 3 but should I play the other two games to understand anything that's going on? I don't mind missing a few references but if I'm missing major chunks of the story than I'll hold off till for now.