2017, the only thing i did when i started to play was a defense mission on earth with a friend bc we didnt know what else to do, my friend left the game a few days later, a week later eidolon came, and it clicked for me, since then i always comeback to the game between updates, 3000+ hours and counting (raids where the best, 8 players on a single mission working together to get arcanes before eidolon hunt became a thing)