Source: http://battlelog.bat...54787641411871/To celebrate our 10th anniversary and two millionth Premium member, we are giving away Battlefield 1942 for free! Relive if it you’re an old-time fan. See where it all started if you’re new to the series. You can download Battlefield 1942 right now on Origin at: http://origin.com/demos and learn more about this DICE classic here: http://blogs.battlef...f1942-for-free/
There are some things you need to know. The most important one is that you CANNOT use this to play with people that have the disc-based version....
Q: Can I play online against players who have the original disc-based version?
A: No. This Origin digital download version can only be played against other players who are using the same version. But since it’s free for everyone, everyone can download their own copy of the game. This version of the game will only show applicable (new) servers in the server browser.
And no this does not include the expansion packs.