From 3D Realms:

Apogee Software has been around for 17 years now - the first title was
released back in 1987 when Apogee was nothing more than Scott Miller
by himself in his bedroom. The games released back then were quite
different, and over the years, we've released quite a few titles.
Anyway, today we're here to bring you a freeware release of some of
the earliest titles from our past. The two we're releasing are "The
Adventure Fun-Pak" and "The Puzzle Fun-Pak". Each of these packs
consist of four titles on their own. Here's a rundown on what's in them:

Adventure Fun-Pak:

* Rogue Runner
* Night Bomber
* Raiders of the Forbidden Mine
* The Thing

Puzzle Fun-Pak:

* Block Five
* Asteroid Rescue
* Phrase Master
* Maze Machine

Most of these are old text based games, and some of them won't run
terribly well on today's faster computers. We do offer two "slow down"
programs on our downloads page (Moslo & CPU Kill) - you might need to
make use of one of these in order to play them. The slowdown programs
are not ours, we're just offering them as a convenience - we can't
help in getting them working for you. We're also told that the DOSBox
emulation program has slowdown routines, too. Furthermore, we offer no
assistance of any kind with these freeware releases - we do not
support them anymore. Please don't ask for help with them, you won't
get any.

Keep in mind these games are being released as freeware. They are NOT
public domain. The difference is that while we will allow you to
download these for free, we still retain copyright on the titles, and
you can't turn around and sell them; you can't do whatever you want
with them, basically. You can grab the zip file with the two packs
here. ( ftp://ftp.3drealms.com/share/packs.zip ) Enjoy these really
early examples of our company's legacy for free! We do have two
previously released early titles available as freeware - old text
adventures Supernova & Beyond the Titanic - you can get them from the
downloads page as well.

If you'd like to learn more about the early days of the company, we
strongly urge you to read the "Apogee FAQ", which is available on the
FAQ page of our website. It has answers and information for just about
anything you could possibly want to know about us.

http://www.3drealms.com/downloads.html
http://dosbox.sourceforge.net/
http://www.3drealms.com/faq/index.html