Can you still play PSO Episode I & II on Xbox?

I heard that you need a Xbox Live account to play Phantasy Star Online Episode I & II on Xbox, even for the offline mode.

Unfortunately, the service was shut down for the first Xbox generation (in 2010-04-15).

I wonder:

• Is it impossible to play this game on the Xbox 1 now?
• Or do those versions that were once activated in Xbox Live still work?
• If so, are they bound to the Xbox they were activated on or could you buy an once activated version of PSO Ep. 1 & 2 and play it on your Xbox (which was never connected to Xbox Live)?
• Back then, was it sufficient to activate the game once, or would you have to subscribe to the service for as long as you wanted to play? (difference between online and offline mode?)

(I assume you can't play it on Xbox 360, as it is not listed in the List of Xbox games compatible with Xbox 360.)

Solution 1:

All you need to have is an Xbox memory card to do this:

You need to transfer an Xbox Live account to that Xbox in order to play. The reason why you need an Xbox Live account is because the whole serial code was not needed for Xbox it only required that you had Xbox live or an old account.

You have to have a gamertag to play Xbox PSO, even offline. Xbox Live for the original Xbox was shut down years ago so you can't create a gamertag anymore. If you have a means of copying a friends gamertag to your Xbox that can work. If not, you should probably consider playing on a different platform.

Sources: Sega Forums | Phantasy Star Online Forums