[edit] I’d posted something to go into more detail. But I’ve decided that branch of conversation is not really the way forward.
I’ll just say that the software is not installed by choice, and it does things that people don’t want it to do… so it could be described as malware. But if you want it on your computer, then I guess for you it is not malware. In any case, it doesn’t look like we’re going to agree about this regardless.
I was totally fine playing HL1, and HL2, and HL2 episode 1… but I never finished episode 2 because of motion sickness. The problem isn’t really with episode 2 though. The problem is just that I got old, and now I get motion sickness from FPS games that didn’t affect me before.
But I do know that not every FPS makes me sick. I think mouse-look smoothing helps. I’m not certain what else, but I’d try messing with the field-of-view angle and stuff like that.