So, you play HuniePop or another NSFW game on Steam but also still want your friends to see your games library to know what to get you for Christmas? Thankfully, Valve has your back with an update to Steam that allows you to mark individual games private rather than an entire library, as well as some handy features that enable efficient shopping
Source: Hot Hardware – Steam Privacy Update Lets You Hide Games On Your Naughty List, How It Works