Some people who have played FATE
are of the opinion that you only need
"FATE: The Traitor Soul". *!
When I search for FATE here at GOG
I get the link to
"FATE: The Complete Adventure".
There are no links to the individual parts
on the store page. But GOG still offers
"FATE: The Traitor Soul" separately.
And according to many gamers,
this is the only thing you need.