Illegal, and copyrighted.
If you mean to play the game without the base game, the answer is no. You must have the base game to play.
Buy it for a game system.
You can if you have already downloaded the Sims 2 pets game. Without it if your able to download an animal your game might crash.
You can download a cracked version of the game on most download forums
You can't you have to have the CD to play the game. So you have to buy it.
Go to your Uploads on your Sims game launcher and download it on to the website.
You cannot download it without a code but if you know somebody with the same game you can use their code even if they already used it.
It depends on the system you would like to download the game to. For computers: You'll need to purchase the base game first and install it onto your computer using the serial code provided. For mobile devices: Sims Free Play is available for free download at the app store. Acquiring the actual Sims 3 game though, requires payment.
Unfortunately, there is currenly not a website to play the game Sims online for free without having to either download the game from a non-official site, or buying the game.
Unfourtunatley there is no such thing as Sims Online because The Sims requires a download and in order to download it you'd have to purchase it from a store because it also requires a CD & a bar code.
you have to buy the game first
Have EXTREMELY good virus protection