How can a game load a save from another game?

I’m working on a chapter-based game. I’d like to have the save file be read by future installments, as well as future games if this game is successful.

I’ve only seen the current in-engine save system read files made by the game that created it. Is there a way around it, or are there plugins that would help?

You can use Like sqlite, dump your Savefile to json and do with it what you Like (save it, send to Rest…). Also you can implement a versioning Logic INSIDE of your ue savegame. Not Sure why a newer Version should Not be able to read the savegame