When comparing Daikatana vs Open Arena, the Slant community recommends Open Arena for most people. In the question“What are the best PC arena shooters?” Open Arena is ranked 3rd while Daikatana is ranked 20th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Has a great single player campaign
It is both challenging and versatile. The lore is simple, you're a time traveler and as such you will come across different sets of weapons from different eras. The story might be a little cringey at times (has a few tediously long cut scenes), but if you enjoyed Quake 2 then you will enjoy this for what it is as well.
Pro Free and open source
Pro Cross-platform
Mac, Linux, and Win. And even Android.
Can run in webbrowser as shown on openarena.live
Pro Community works
Pro Runs nice on very old computers
Pro Active clan scene
Pro Active in development
Pro Very enthusiastic developers and players
Cons
Con Companion AI is bugged
Sometimes they get stuck or lost, which will prevent you from leaving the level/area. This has been patched in the 1.3 update where you can disable companions altogether, although this needs to be manually updated.