Eye of Cthulhu
That can be ^^Clearly, you do not understand how games work. File sizes are irrelevant. It's all a matter of how much you can efficiently fit in memory at any one time. I think Terraria loads the entire map in one go - Bravely Second isn't even open world. You're loading segments of areas. That's why it's prettier. But pretty isn't even relevant here, as the two games are completely different games.
And I never said that I know it
Atm i just want my game working without crashes