I’m not really sure EDF 6 is the best entry point to the series, as it’s a direct sequel to EDF 5. I think it will get really confusing story- and missionwise, more so than it already is. EDF 5 was a soft reboot and is also a bit cheaper.

My friends and I really liked the WORLD BROTHERS 2 spinoff too, if someone is looking to play with a young player that might be a better starting point than the mainline games. The rest of the series spinoffs have not really done it for us.