[rylz]

How about you provide a way to generate an additional URL which would be associated with your own anonymous account rather than with an individual game? When this other URL is opened in a different browser (perhaps on a different device) you could associate that new session to the same anonymous account.

This way, if I know I'm about to terminate my browser session, or if I just want to move to a different device, I could do so without making an account.

The only problem is how to present this in the interface without confusing users and generating unnecessary clutter. I would probably put it near account creation options as an alternative.

[baddox]

> The only problem is how to present this in the interface without confusing users and generating unnecessary clutter.

Since what you want is literally no different than creating an account (except perhaps the existence of a password), why not just make an account? Rather than remember or store an "anonymous user URL," just choose a username and remember or store that. Allowing username creation without requiring a password is a great idea for something like this.