Why do I feel so drowsy playing certain video games?

Recently its been happening again while playing Dragon Age 2 for xbox 360. I love the game and want to keep playing but it seems after a half hour i start to feel so drowsy this is a very uncomfortable drowsy where i gotta lay down immediately or it feels like I'm going to collapse. The other game I remember this happening was when I played one of the harry potter games for PS2 a long time ago and with a couple others but this is rare and always happens to games I love playing. I sit about 4ft away from the TV but other games don't bother me when I sit this close. Why is this happening when I play Dragon Age 2?



Hope I put the question I the right location.Why do I feel so drowsy playing certain video games?
there's a rumor that some games have side affects to them

and i think its true because when i play silent hill i feel like someone putting

pressure in my head

and when my brother play it he felt like something hit him

maybe its that or maybe you need to eat some potassium (like banana)

that's what i eat when im drowsy idk if it would work for youWhy do I feel so drowsy playing certain video games?
Lighting in the game and tones in the musicWhy do I feel so drowsy playing certain video games?
this is your body's response to the brain when you were stuck in a groove,which had taken a lot out of you.

the mass appeal of video games are from its need of attention,when playing it,you need to be on your toes and must never take your eyes off the ball to stay alive.nonetheless,old hand as you are,notching this up is a doddle for you and the victory is in the bag so the dull as ditchwater feeling had come upon you apace since it isn't as challenging as others.

to overcome the monotony,it's time to cool it when you are tired,don't wear your eyes out that will be detrimental to your eyesight and do some exercise outdoor.

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