Amnesia will not launch from Steam?

[IWork4Dessert]

I have no idea how to nav to that on a Mac... the problem is, there are only a few files under my actual Steam file directory(such as cache, games, etc), barely anything, and it's really hard to find given the horrible library interface.

I'm starting to get really pissed here. None of my games are working. When I open Portal 2, the only options in the start menu are "No Steam" and "Quit". And since Steam has no technical support number, I'm stuck waiting for a reply to a ticket that I sent ages ago. This is ridiculous.

Perhaps the shared steam account is the issue?