Alienware laptops are the best for high end Gaming
I would very much doubt it, Onboard graphics are no good for games unless you have a really top end latest edition onboard gfx card
It would need to be reasonably powerful to develop and test games on and dual graphics adapters would probably be needed. You would definitely consider a desktop computer for this job though, not a laptop
My laptop is a sony vaio with a geforce graphics card. It'll run you about £1500 but it has amazing graphics and an unrivaled processing system. It has 3d glasses and a large memory capacity.
Intel HD graphics are a bad choice. They deliver minimal graphics, and play hot while gaming. The ram is pretty good, and I think the hard drive would work. I suggest you get a desktop if you want to play games well, but please, don't get Intel HD graphics
you will have to buy a graphics card but any laptop can take it. A graphics card would cost £30 -£40 but it is well worth it.
I had a 6680 with my old laptop and currently have a 7680 with my new one and its quite nice.
Any laptop with an i7 processor and a ati or NVidia Graphics would work just fine.
Not all of them can, it depends on what kind of graphics card you have in your laptop. I would suggest going to this link: http://www.nvidia.com/page/geforce8.html It helped me find the best graphics card for my laptop.
You can play Sims 3 on a laptop. Whether or not your laptop would allow you to play Sims 3 with the Sims University Life and late Night would depend on the graphics card and the amount of RAM in your laptop. Each game should indicate the laptop requirements needed to install and run the games.
The best gaming laptop with 3D graphics would be Dell's Alienware M17x. It has an Intel core i7 940XM Extreme Edition processor and NVIDIA GeForce GTX 285M graphics. Market value is $1799, but Dell's Price is $1599.
If your laptop has the required processing power, you can play Steam games on your laptop. Both my brother and I play Steam games on our laptops.
It depends on the computer model, it would require you to disassemble the laptop swap video cards then reassemble the laptop and this would be likely damage the computer. I too have looked into this.