I quite enjoy me some UT, I have fond memories of playing UT99 for the first time on my old Pentium 3 IBM machine... ahhh so nice Anyway the newest installment is currently available to play for free, running on the Unreal engine 4. This is probably old news but it's new to me so I'm sharing it https://www.unrealtournament.com/ You have to use epic games stupid (steam esq) launcher software though..
I was considering playing this, but PC gaming has left me with a sour taste in my mouth as of late. I've fallen out of sync and getting games to run properly is always a hassle, no matter how good my rig is, so I'm opting for consoles for the foreseeable future.