Unreal Tournament is an upcoming first-person shooter video game developed by Epic Games. It is currently in a pre-alpha state and will be the ninth installment in the Unreal series. The game utilizes Epic's Unreal Engine 4 and will be released for free on Windows, OS X, and Linux. Unreal Tournament is unique in that the development will be crowdsourced and open to contribution from anyone. Epic Games will be using forums for discussions, and Twitch livestreams for regular updates. Unreal Tournament is being developed in close collaboration with the community (see The Future of UT). It is still very early in development, so it's incomplete, buggy, full of placeholder art, and therefore is not in any way representative of the ultimate vision for the game. You really shouldn't play it now! That said, if you want to see where we are, offer constructive feedback, or maybe even jump in and start contributing, developers've made this build available. Reproducible: Always
https://forums.unrealtournament.com/showthread.php?12011-Unreal-Tournament-Pre-Alpha-Playable-Build https://aur.archlinux.org/packages/ut/ut4/PKGBUILD
Actually, there is source code on GitHub (repo is private, but anyone can get access) - https://www.unrealengine.com/ue4-on-github
There's already a package "games-fps/unreal-tournament", which is unrelated, right ?
This project was cancelled when Epic chose to spend time working on Fortnite instead.