yes!
Star craft two is the next game in the Star craft series.
if you don't pay for it it's stealing. you can, however, steal it. it is, however, illegal to steal.
starcraft is a prequel to starcraft 2
It certainly is.
Star craft 2 is for the PC system, different types will work with MAC but you have to buy the compatible software.
yes, so it can save achievments to you online profile at battle net
from my point of veiw yes it is.
Absolutely.
If by skirmish you mean able to play AI in 1v1, 2v2, 3v3, and 4v4? Then, yes it does have skirmish.
because it is awesome
If you mean custom games you go into multiplayer and in the bottom righthand corner you should see the custom game section.