Separate names with a comma.
You could type in to google "Game X is only using one core" and see what happens?
My history tells me you will need to manually do it each time, but I may be wrong.
FNV had the extender.
Depends on which game it is.
Didn't find anything online but it is Beyond DIvinity. https://media.discordapp.net/attachments/179094801315135488/586639282329092097/teste.png That is what happens every time i restart.