About a year ago I discovered that even though the Wayback Machine blocks access to the file areas of 3D Action Gamers' Archive because of robots.txt, this restriction was somehow bypassed with this address:
http://gamers.org/pub/3dgamers/00archives/

The snapshot from 1997 preserves most but not all files mentioned in the directory listing. I was able to get some files from there, but after a while the Wayback Machine blocked all access to the files, citing robots.txt. However, recently I checked that address again and the files so far can be downloaded without restrictions.

The archives include demo and shareware versions, patches and preview screenshots/videos from 3D action games released in the 90s (up to early 1997). I'm not sure how interesting those would be to the people here, but the files certainly have historical value, and at least some are apparently not (easily) available elsewhere.