Is it possible to have two seperate players, control ONE avatar ie. One does movement, the other does look, scope, aim etc. ???? Probably a stupid question but i honestly didnt know where to ask. 

You could probably do this if you bind the controls to two seperate input devices like one player uses a controller while the other uses the keyboard. This is assuming your using Unity not sure if that's possible on any other engine.

Of course you can. Define two players that collects its own input (or one input if the game uses only a keyboard for two) then assign each Player to call the avatar's behaviors each.

Since it's not clear if this is a video game or not, there's another method to have fun with this: Get a human-like doll that has a scope (or attach a scope) as the avatar, then have a Player to move the avatar (and the legs for movement aesthetics), then the other Player to use the scope, aiming at something. Human hands connected to the brain are the user input. ?

When it comes to computers, anything that the hardware is capable of supporting can be achieved.  If a particular library does not give you the flexibility you require, you have the option of either using a different library, or bypassing it by writing your own lower level code to provide you with the functionality you require.

There have been a few games like that.  One that has had a few variants in history is a tank. One player controls the vehicle movement, another player controls the weaponry.

Heroes Of The Storm (HOTS) currently has a two-headed ogre. One half of the ogre is melee, the other half is mage. When they can work together the ogre is powerful, but most of the time unless the two players have practiced together, the character appears somewhat inept and comical in game.

Consider some of the vehicles in the Halo games: one player drives, one operates a turret, a third can use their own weapon from the passenger seat.

So yes, given these and the examples above, it's definitely possible and can be a fun experience.

How you might go about implementing such a thing depends on how you're creating the game, exactly what gameplay you want, etc.

13 hours ago, Chris.poppy1 said:

Is it possible to have two seperate players, control ONE avatar ie. One does movement, the other does look, scope, aim etc. ???? Probably a stupid question but i honestly didnt know where to ask. 

I am a big fan of Robotron. It was an arcade game with two large 8 direction controllers. One for shooting and one for moving. You could run in one direction and shoot in another. Although I've never tried it, I think that it would have led to major fights if 2 people had tried to do co-op on it.

I have tried sharing pinball controls with another person. One person controls the right flipper and another the left. That always seemed to work out ok.

But anyway, a general answer to your question is grab any FPS and let one person control the mouse (only for shooting and weapon select) and another the keyboard (only for moving and using). See how long the fun lasts before a fight ensues.