Half-Life 1 and it's mods like Blue Shift, Opposing Force, and Team Fortress are rated M for mature players seventeen or older. There is a ton of blood, and dismemberment in them, but nevertheless, they are all great games.
It is pronounced like go-ray
it wont come up with gory images unless you search for something like that
Yes definitely only if you don't like GORY stuff! 
Gory, gruesome, ummm . . . lets not get into details . . . ewww
Redshift and blueshift refer to a change in frequency of light we receive from distant objects (stars, galaxies, etc.) The light can turn different colors, and purple is one of them. However, no matter what the color the light changes to, the technical term is always "redshift" if the frequency of the light decreases (normally indicating that the object is moving away from us), and "blueshift" if it increases (normally indicating that the object is moving towards us). Blue shift and purple shift would mean the same thing because the spectrum is one-dimensional. It's like if you are in Boston, a shift towards Chicago is the same as a shift towards San Francisco. Obviously, a purple shift is a super blue shift.
Blue shift is a phenomenon whereby a moving object emits light in such a way that the waves of light actually posses a higher frequency than when emitted. Its like a pitcher throwing a fastball versus the same pitcher throwing a fastball from a moving vehicle; to an observer on the side of the road, the ball has a higher velocity when being thrown from the vehicle than from a stationary pitcher. The higher frequency of the light results in a shift towards the blue-end of the visible light spectrum; hence the name blue shift. This is a method used in astronomy to determine that a visible object is moving towards the Earth.
Very. If you don't like gore, it wouldn't be the game for you.
Half life 3 isn't even out yet so yer like totally idiot
The effect of auxochrome on a chromophore is described by terms like bathochromic shift (red-shift), hypsochromic shift (blue-shift), and hyperchromic effect (increase in absorbance intensity). These terms refer to the changes in the absorption spectrum of a molecule due to the presence of an auxochrome group.
very gory there would be lots of blood and guts
You can change the color of an object from orange to blue using image editing software like Photoshop. Select the object, use the Hue/Saturation adjustment layer to shift the color towards blue, and adjust the settings until you achieve the desired blue hue.
you can get it by buying it from steam for computer the orange box is cheaper and it comes with diffrent games like halflife 1 and 2 and portal 1