This isn't the first time that there were puzzling contractual misunderstandings between Electronic Arts and GOG. When Privateer was added in June 2011 and WC1+2 in August of that year, they were missing the expansions. Despite conversations to add them looking promising in the summer of 2011, they didn't actually appear on the service until December 2012.
Syndicate and Ultima Underworld are back on https://t.co/TiMFdAcy7Z! 💜— GOG.COM (@GOGcom) August 6, 2021
Join our celebrations and grab them for FREE during the next four weeks 🔥
📆 Offer lasts till Sep 3rd, 5 PM UTC. pic.twitter.com/fGyJZtrNwU