I wanted to play UT2004 for some nostalgia recently. Turns out even though I own it on the Epic game store, I can't play it because Epic removed it from the Epic game store.
They removed all UT games from online stores and added UT 3X which is a free version of UT3 with Epic Online Services baked instead of original ones.
The only way one could legally get UT99 is to buy physical. And it's been like that for many years prior to an event above, which also disabled the server browser after 22 years of running intact.