no, The Sims 3 and the sims medieval are completely separate games :)
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Yes you do, you need it to play on any of the sims 2 PC games
Yes you can play it with a disk and if you don't want to buy the sims 3 you can download it but if I was you I would buy it because you always get vurus on your pc
No But i would get it for PC anyway because you will be able to get cheats on that hopefully.
No.
the nly kind of online free sims game is sim social. you can play it on facebook. its ok but not as good as the regular sims pc