Lesson learned: Do not play Portal/Portal 2/any given Valve FPS for longer than 20 minutes because I will get virulently nauseated. I used...

Lesson learned: Do not play Portal/Portal 2/any given Valve FPS for longer than 20 minutes because I will get virulently nauseated.

I used to be fine with them.

Now I get seasick sitting at my own desk.

What the flip?