The game episodes have been removed from the website and it's now illegal if download them now from anywhere on the Internet. However, you legally own them if you have downloaded them while they were available on the Secret Ops site.
You can still download the Main game from the Offical Webpage, but unfortunately, Origin no longer has the other 6 mission files available for download.
Thank goodness ingava.com has archived the episodes for download.
All the "cut-scenes" in the game are rendered in the game engine itself. While this is nothing really new (Starsiege did that long before Secret Ops), it was a first for an Origin game.
Secret Ops probably was the first major experiment in distributing a game over the internet. Split into one major download, an add-on speech-pack and seven mission parts, you could choose what you wanted to have.
Every week you could download the latest missions, which you had to activate with a code you got when you finished the last mission of the predecessor and best of all the game (in that form) was for free.
Special about this game was its form of distribution, as it was available free over the Internet. Starting August 27th, 1998, when the basic game files and the first missions were released, a new episode containing 6-8 missions was made available weekly over a period of seven weeks. Fiction leading in to a new episode was released on the Secret Ops website a few days prior to the actual episode. The release ended October 31st, 1998.