Simple Answer: Rockstar Launcher. DRMs like Steam and EGS seem to cause some issues (Mostly EGS but who wants to buy stuff there anyway). Rockstar Launcher is also better since shortcuts don't need to open Steam or EGS, then Rockstar then the game. I have had many issues with GTA IV and V because of Steam opening then Rockstar and sometimes it just gets stuck. Best Idea is to buy it directly from Rockstar.