Star Wars Jedi Knight: Jedi Academy, known by regular humans just as Jedi Academy, is a shooter that was released back in 2003. Part of a series that originated with the best Star Wars game of all time, it's being kept alive by mods like Movie Battles, which "lets players play and fight in the most iconic battles seen throughout the entire [Star Wars] saga!"
Movie Battles takes Jedi Academy's fairly standard multiplayer — already very good and sadly underrated/forgotten — and juices it up with extra classes, new maps and the ability to play as characters like Han Solo and Boba Fett (including his jetpack).
Jedi Academy was never as ambitious as true multiplayer games like Battlefront, since it was designed primarily as a singleplayer game, but still; the lightsaber combat in these games was fun.
Here's some video of the mod in action, courtesy of Vongs Yuzzan:
I mean, yeah, it's still very 2003. You can't do much to change that. But it's good 2003, and the attention to detail in the recreation of famous locations like the Death Star hangar is awesome.