This is the Origin policy that basically forced Valve to act and implement their own:

https://help.ea.com/en-us/help/account/returns-and-cancellat...

* Within 24 hours after first launching the game

* Within 7 days from date of purchase

* (If pre-ordered) Within 7 days of game release date

Valve gives to a little more calendar time, but Origin has no play time limit as far as I can tell.