I love Wolfenstein series as well, I play Wolf3D almost every day, and I have Castle Wolfenstein, Wolf3D, SOD and the "Lost Episodes" (nothing lost about them though, it's just a name that stuck on them for some weird reason). I've always liked Wolf3D best. I used to have Beyond Castle Wolfenstein, but the disk stopped working
Do any of you play any TC's or addons for Wolf3D or SOD?