I'm using a refer link and I can tell you, KOTFE is a single-player. SWTOR is a single-player with option of multiplayer.
If anyone don't play OPs/WZs regularly, Preferred Status is for you.
SWTOR have so many achievements for complete and this is the best way to play in Preferred/single-player. Addition you can buy Weekly Pass for OP in GTN
This game die in 2016