Review:
After finishing OIALT and seeing this was by the same dev, I instantly downloaded and finished the entire game in a single day, let me tell you, it gripped me hard, holy shit, I didn't know what I was missing. I always saw people recomending this, but never thought to download, but now, I can't wait for the next update.
I really liked OIALT, and because of that, I don't want to disrespect it, but Eternum is an upgrade in pretty much every single thing. The way the game treats the LIs is much better. In OIALT, the game revolved mostly around the main story, so there wasn't much room for development with the girls who weren't part of it. The secondary girls don't get much. Jasmine is a bitchy rich girl, then she gets fucked twice and is in love and ready to abandon everything in order to live with MC and his harem. And even amongst the main girls, Carla and Rebecca don't get a lot of content. I like how in Eternum, most girls already start with their own implants and then Nancy and Penny get convinced early on to join in, making them a part of the main plot. And even outside of the main storyline, you get to have quality time with the girls. Visiting Luna's family, Penny's photoshoots, party with Penny and Nova, etc.
Honestly, I'm loving the game. If you look in the dictionary the definition of "came for the porn, stayed for the plot", you will see a picture of Eternum. All the LIs are great, so much so that I have a hard time choosing a favourite (Calypso still needs a bit of work, the stick up her ass still annoys me a bit, but I'm sure this will change in time). The story is great, the fact that Eternum has different servers with different themes, allows for Caribdis to explore a lot of cool things, like the sci-fi date with Annie, or the investigation with Luna and Annie, etc. And the humour is pretty much the same as it was in OIATL, which was right up my alley.
Theory:
Now, there are almost 2k pages of discussion and I don't know how many of those are just about the last update. I haven't read many of them, but some of those I read, posed some theories about death and resurrection, or about a possible loop, or something. One I didn't see posed, but maybe has been and I just didn't see it,