Comment by edg5000
9 hours ago
Am I reading this right, and was only the file header encrypted? Also, wasn't ID the company that did not use serials or other DRM? Maybe that explains their naivite, maybe they underestimated how easily games get cracked.
Not sure about the early days - I got a Quake II CD in the early 2000s that didn't need a CD key. Doom 3 and Quake 4 required CDs, at least at release, but after a little while no CD patches were released.