Is it normal to feel like this when playing cod: waw?

well, a friend of mine brought over COD: WAW (a game I really wanted at the time) and got bored pretty quickly, so he let me play campaign.
I thought it was fun at first, but after a few minutes, I started to feel...strange.
I felt like I was mindlessly killing people to the point where I started dosing off into empty thought as I was trying to take down a few tanks.
I started to get a headache after the first 4 levels and started to feel sick to my stomach.
The thing about this is...I usually feel entertained when playing games like these.
When the 5th level started, I immediately turned the game off after I began to feel light, then I returned to normal an hour or so later.

If you have any idea why I felt this way, please leave a comment.

P.S. I have beaten nearly every COD game, but none of them have done this.

Voting Results
28% Normal
Based on 29 votes (8 yes)
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Comments ( 2 )
  • humbugmarmalade

    Waw is a dark game, set in a dark time, it can be quite horrific - i found waw to affect me more than the others - all the stabbing and shooting made me feel violent, but not light headed or sick

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  • Youwouldn'trememberitanyway

    Sounds like a coincidence to me maybe you just ate something bad

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