I need help!

ok i used to play guild wars years ago when it first came out and my account got hacked. I am now trying to get back into guild wars but i wanted to know if i were to buy factions or nightfall will i be able to play the original guild wars too or do i gotta get a seperate activation key?(if i have both the discs) thanks in advance

If you still have your original account, you can add Nightfall and Factions (which will allow you to play all three campaigns). However, if you are contemplating making a new account, you will only be able to play Factions and Nightfall - not Prophecies.

What might be worth noting however, is that the Complete Collection or the Trilogy offer all campaigns for a lower price than buying all three separately.

Disks are worthless. What let's you play is the access keys(which are also one time use only) and every campaign comes with their own unique access keys.

If you've gotten your original account back, then adding the new Factions and NF keys will let you play all three. If not and you are making a new account with those 2 keys, then no. The Proph(original GW) key is obviously not on the new account and the key you have for it is already used.

Btw, if you still have/know your original access key and your account login info, you can try contacting Support and get your account back.

You need a separate access key for each campaign. If you add each of the access keys to the same account, then you will be able to play all of the campaigns on the same account, with the same character.