One of our pals answered most of your doubts (props to him) so I'll take the latter. You don't have to play OiALT to keep up with Eternum. There will be mentions of certain characters from OiALT but these two games are entirely different. That said, do play it anyways, It's greatIm sorry if this was answered before but... do i miss a lot of content if i don't go for one or two of the main girls? Or i just miss their scenes or maybe i miss a important part of the main plot aside from the scenes? I will like to know this before i start the game... Also i didn't played OiALT should i play it before this one?