Configuring the priority of the repository.
In OpenSuse, the priority of a repository is a value between 1 and 200, with 1 being the highest priority and 200 the lowest priority. If a package is available in more than one repository, then the repository with the highest priority takes precedence. Default is 99.

This is how I do via terminal:

List enabled repositories in priority order:
zypper lr -PE

In my case, the repo I want to change is:
4 | home_paul4us | home:paul4us | Yes | (r ) Yes | No | 99
(First column is the ID and last is PRIORITY)

Lower the 3rd party repo priority (set PRIORITY of the repository with ID 4 the value of 100):
sudo zypper mr -p 100 4

You will see the message:
Repository 'home_paul4us' priority has been set to 100.

Bonus
If you want to list what is installed from this repo (id 4):
zypper se -i -r 4

I don’t use Fedora/Nobara, but seems like you can see the update history with: dnf history list

I’ve found this guide for rollback here: https://www.baeldung.com/linux/dnf-history-rollback-vs-undo

You can see the list of allowed/blocked instances here: https://sopuli.xyz/instances

• Diablo I - https://github.com/diasurgical/devilutionX
• Zelda: Link to the past - https://github.com/snesrev/zelda3
• Metroid II - https://flathub.org/apps/io.github.am2r_community_developers.AM2RLauncher
• Sonic 1/2 - https://github.com/Rubberduckycooly/Sonic-1-2-2013-Decompilation
• SonicCD - https://github.com/Rubberduckycooly/Sonic-CD-11-Decompilation
• GTA3/GTAVC - https://github.com/halpz/re3 (Original project github link not available)
• Papermario - https://github.com/pmret/papermario (US Rom 100% decompiled, but don’t have a port yet)

If you use steam, this project https://github.com/luxtorpeda-dev/luxtorpeda, converts proprietary engines to use opensource versions when available. Here: https://luxtorpeda-dev.github.io is a list of games supported by this. How to use Luxtorpeda on Steamdeck: https://www.gamingonlinux.com/2022/03/steam-deck-using-luxtorpeda-for-morrowind-warzone-2100-and-x-com/

Take a look here (base64): aHR0cHM6Ly9yLXJvbXMuZ2l0aHViLmlvL21lZ2F0aHJlYWQvc29ueS8jc29ueS1wbGF5c3RhdGlvbi0y

PS2 section, but there are links to almost every older system (including PS3)

Take a look here: https://r-roms.github.io/megathread/sony/#sony-playstation-2