P-E-S: Star Wars: Dark Forces
Star Wars: Jed Knight: Dark Forces 2
Star Wars: Jedi Knight: Mysteries of the Sith Star Wars: Jedi Knight Outcast: Jedi Knight 2 (Dark Forces 3)
Star Wars: Jedi Knight: Jedi Academy (Jedi Knight 3: Dark Forces 4)
I don't envy the person who had to come up with these somewhat silly titles. =P
Actually 5, you forgot one :), back in the days it was sold as standalone version, which alters the counter for the last two by 1.
And for MotS they only used low res sounds and bad quality cutscenes :(
The rebranding may have had something to do has probably something to do with the game being on the Index-B in Germany, even if in the manual the Bryar pistol was called "stun gun" (really ... all those Storm Troopers are just sleeping).
(edit: But honestly I just think they wanted a new name which has "Jedi" in it.)
Back in the 90s a series of illustrated novels was released, called "Dark Forces" (Solldier for the Empire, Rebel Agent, Jedi Knight).
In Germany, only part 1 was released, telling the story hwo Kyle went from Storm Trooper to tebel recruit. Rebel Agent basically tells the story how Kyle stole the Death Star plans, while Jedi Knight is a variation of the story we know (Luke Skywalker has a cameo appearance too).