You mean Unreal Tournament 3? That was 19 years ago, and it sold well and got good reviews.
No, Unreal Tournament (2014).
It's pretty depressing what happened, actually, because on paper, it was awesome. The base game was free, and it even had a new game mode called Blitz. The amount of maps it shipped with was pretty meager, but the goal was to have modders sell their maps/mods/skins/etc as IAPs within the game and then they got a cut. The game still allowed for private/dedicated servers, and while it lacked some of the polish of UT3, the framework was there and it really worked well as a de facto tech demo for UE4, and was surprisingly stable for an alpha release.
The problem, of course, was that Fortnite quickly became their money printer, limiting how much effort they put into developing the base game, before they finally canned it.
I'm still really bummed about it; I really liked the pre-alpha version I got to play with some friends for a bit.