UT99 VS client-linux

I think that would require a pretty substantial overhaul - the models + textures for players and items are accessible and in a relatively readable format, I'm not an expert but I guess they could be ported. A lot of the game logic is implemented in UnrealScript though, and it'd need to be entirely rewritten in (I think) C++ for UT5.

The UT99 UnrealScript sources are here if you ever want to play around - editor support for UnrealScript isn't great but it's really quite moddable and extensible: https://github.com/Slipyx/UT99

www.nquake.com

QuakeWorld (the "Internet" version of quake 1) is still very active. The source code was open-sourced by Carmack many years ago and the community has been evolving the clients ever since. Today the most popular one - ezquake [0] - features many improvements in performance, networking and teamplay features.

Anybody can download a version of this client along with a mostly playable version of quake [1] (that includes only the first chapter of the original maps like the shareware version but many or most popular multiplayer maps. And if you have the original you just need to place the pak1.pak inside the id1 directory and have access to everything)

There are many ongoing tournaments and QHLAN is about to be held in Sweden on November 17-20. You can find all about these in the quakeworld wiki [2]

To find the servers and games you can use one of two websites [3][4] or the in-game browser. The quakeworld EU and US communities are found on Discord. [5][6]

There is also an automated Twitch channel built by a community member that streams quakeworld 24/7 [6]

[0] https://github.com/QW-Group/ezquake-source

[1] https://www.nquake.com/

[2] https://www.quakeworld.nu/wiki/Overview

[2] https://badplace.eu/

[3] https://hub.quakeworld.nu/

[4] http://discord.quake.world (invite link for QuakeWorld EU Discord)

[5] http://discord.usquake.world (invite link for QuakeWorld US Discord)

[6] https://www.twitch.tv/QuakeWorld

www.nquake.com if one wants to download a package containing ezQuake (a QuakeWorld client with lots of community developed enhancements), the Quake shareware and other goodies.

I'd go with Quakeworld. The weapons are very strong, so it's easy to get frags even for beginners, even if you're playing against experienced players. On that same note, you'll also die a lot lol.

Quakeworld. You die a lot and quick, but you get a lot of kills too more easily than in other AFPS.

Quakespasm doesnt really have the best netcode tho, if you're trying to play coop id probably just recommend the new rerelease of the game, if its something competitive you should use quakeworld.

Download free https://www.nquake.com/