I’ve tried to install gzdoom both through the terminal and GUI and both times it returns the same error: _==> ERROR: A failure occurred in prepare()._
The line of code before that says this: /var/tmp/pamac-build-[user]/zmusic/PKGBUILD: line 20: patch: command not found
I go to that file, open it in Mousepad and that specific line says this: patch -i "$srcdir"/0001-Use-correct-soundfont-path.patch -p 1
I go to that patch file and only mentions the file path for Ubuntu. I know that this makes me really dumb but I really help with this. Thanks in advance.
Have you tried the fixes in the comments of this page?
https://aur.archlinux.org/packages/gzdoom
I find the comments in the AUR package page the best source of information to debug AUR issues.
Anyway, if you don’t want to use exactly that AUR package, there are multiple ways to install gzdoom witch some may be easier to install. You many different packages come up when you search gzdoom.
And what comes to other options, for Steam users there is luxtorpeda that integrates with Steam. Lutris users have their gzdoom runner. For the rest there is flatpak version available.