Just saw that Achievements have been added to TFTUV on GOG. Thank you for keeping your promise. You can be sure that I will buy Season 2 on GOG as well :)
It took a while! But I found out the modified achievement wrapper GOG uses, which worked on Sisterly Lust, also work on other games. So bundling it with this latest update was a no-brainer. Happy to hear you'll purchase Season 2 as well. As soon as I have more news on a GOG release I'll let you know.