Quote Originally Posted by Deathwhitch View Post
No need to use disk at all but you have to have your own copy registered to your SE account or you can't log in, plain and simple
Reason I'm asking is because I'm having a similar question with OP. There are two people want to play the game in my house hold. And for now we are playing using the same account. But eventually one of us will create a different account but not sure what would be a cost effective way to do it (Between buying a PC digital copy or buying a PS3 physical copy).

I tried to log in with a different account with PS3 (not yet registered), but the login ID filed is grayed out. So my question was if we want to play using the same PS3, would inserting a different disc allow logging in with a different account?