Use gsettings:

gsettings set org.gnome.desktop.interface gtk-theme 'Adwaita-dark' 

gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark'

it really is a pretty game

Windows 2000 looked amazing.

What kind of problems did you have?

I hope that when my current laptop dies, a somewhat libre and linux-friendly alternative with an ARM chipset will be on the market.

we're all going to die

Yes, please!

I've only played the first few minutes of the first Half Life (I know, it's on my list™). I had to turn off texture filtering immediately; the game looks terrible otherwise. Question: Why did games of this era (Morrowind also comes to mind) look this way, i.e. blurry?

the fish is dead? :o

You might not even have to log out: Just change the user in the terminal: su - user2