I figured there was probably a Linux version of it somewhere (although I didn't know it was freely available), but: 1. I already have Windows/DOS installers for all of the old id games based off the DooM engine. 2. I wanted to see what I could get WINE to successfully run. 3. Since I'm rather new to Linux in general, I figured trying to figure out why an app won't run in WINE would be a good learning experience. Also, what do you mean by "appdb"?