1. You have to install it
2. After you install it, there's 50% chance that u can play the game
3. Most of the game you have to crack it and do weird stuff like install updates or patches... bla bla bla
4. and if you buy the CD games, 70% chance you can't play it, I don't know why
5. aaaand sometimes they crash
6. and lastly if you want to play online you have to download "version 1.9 (random number) or *NEW* online patch"
whatever it is.
that's why i hate PC games.