The mods probably added the date to the title later to make it clear. It was discussed in 2015 https://news.ycombinator.com/item?id=9425587 (55 points | April 23, 2015 | 11 comments)
Stories about historical artifacts are popular here and it's not unusual that they are reposted a few years later by someone that missed the original discussion.
This is news to me, and I like classic ADVENT type games. I've bookmarked it for future investigation, and maybe tackle the broken LOAD/SAVE in the pure DOS port.