I played Assassin's Creed Odyssey for over an hour today at Jiffy Lube. It was awesome, and it only took 2.68 GB of mobile data. Their estimates are pretty spot on! :
Assassins Creed Odyssey Guide - Legendäres Set - Amazonen / Achilles - Legendary Set - YouTube
Assassin's Creed: Odyssey (Playstation 4) (PS4) – Big Bad Evil Games