Quote: " Sorry, this is a stupid question, but HOW do you even make patches for an FPSC game?"
It would be an installer that will add/overwrite files within your game directory.
For Example a new weapon upgrade,
The installer would add the corresponding gun files to your game "Files" directory.
Yourgame/files/gamecore/guns/yournewweapon
Of course, your new weapon needs to be accessed by the player, so you could create a new level or place the weapon in a previous level and overwrite that level via the installer.
Landman