I bought on Steam. I don't know is it special to me but it has to be open everything. (I can't access to them and my version is like 0.10) You can buy it on Steam but I don't know how to check special quests so it could be better on patreon I guess.
the first patreon quest i ran into was with Amelia saying she needs help to recruit new people, have you been able to do that one on steam? And in the quest log in the lower section of your room there is a section of the log on the right that is patreon only quests, could check and see if any of them are done.