Guild Wars 2

Terrahero.9358:

Kal Spiro.9745:

It has also been pointed out that each of the “stand alones” came with a new class.

Prophecies did not have new professions.

Guild Wars 1 had 2 character slots. All of the stand-alone campaigns (nightfalls, prophecies, factions) added 2 additional character slots. Prophecies did not add new professions, but still gave you 2 character slots.
The non-stand alone expansions did not give additional character slots.

The stand alone campaigns gave you 2 character slots because they were stand-alone, simple as that. They needed to have character slots because people could very well pick them up on their own and play them.
The direct expansion EotN did not have character slots because it was only playable if you had Guild Wars to already give you character slots.

This is wrong. Had to come on to correct this.

How the campaigns worked is: the first campaign added gave you 4 character slots. Adding the other campaigns added 2 slots each (total 8, if you had all 3 campaigns on your account). This was true regardless of what order the campaigns were added.

I agree that ANet’s history is to provide additional character slots equal to the number of new professions (classes, whatever) added. Hence, I would expect one to be included with (and built into the price of) HoT.