Not exactly, Unreal the single player game is also from 1998.
If you meant Unreal Tournament, it was released November 22nd 1999, just a few days before Quake 3 Arena that was released on December 2nd 1999. UT was also mostly a multiplayer arena type game like q3a. It was a really hyped up battle of giants back then between those two. Good times.
EDIT: corrected release dates after checking wikipedia
If you meant Unreal Tournament, it was released November 22nd 1999, just a few days before Quake 3 Arena that was released on December 2nd 1999. UT was also mostly a multiplayer arena type game like q3a. It was a really hyped up battle of giants back then between those two. Good times.
EDIT: corrected release dates after checking wikipedia