A "Holiday Update" on GOG.com announces the addition of some free expansions to some EA games offered on the service:

A while back, we started to sell EA games--great classics such as Wing Commander, Privateer, and Alpha Centauri. A few people--just a few!--noted that we didn't have the expansions and that made them sad panda.

Well, panda, be sad no more! As a holiday gift from us to you, we're bringing everyone who bought (or buys in the future!) the expansions for Wing Commander 1 + 2, Wing Commander Privateer, and Sid Meier's Alpha Centauri for you today! These expansions are free updates, so just download the new installers for each game from your account and start playing now! Note that these EA games will not be part of any Daily Deal bundle, so go ahead and pick them up now for only $2.99 each.