It is quite legal to buy the copyrights COPY and RIGHTS then start copying rightfully.
Without buying the copyrights, making copies is absolutely an act of offence that causes damages and IS promptly incriminated by the law.
That depends on the local law. There are countries where it is fully legal to make a copy for personal use of digital media. This includes games, but also videos and DVDs. The keyword is 'personal' of course. You are entitled to make a backup copy in case something goes wrong with your original product. You've gotten that right when purchasing the copy. In that sense it is not illegal.
However the software you've purchased is in most cases restricted to be played on ONE machine only at a given time. So it's fully legal, to give the original to a friend, making it impossible for you to play, but allowing the friend to play. Using your copy instead is illegal again, although owning the copy is not (if you have the original also).
