Review based on 0.4:
REALLY good game. After playing Once in a Lifetime, I took my time before i played Eternum. And somehow Caribdis managed to make a game which is even better than OIAL.
Story is great. So far, really enjoyable and the setting with the Real World and Eternum itself basically gives endless possibilities without getting unrealistic.
Great cast of Characters, very unique, both in personality and Looks. I also think that the number of Main Girls is perfect, 7 is not so small that it gets boring, but not too much that some girls dont get attention. (In OIAL it was the same number of girls, Eternum adds Side Girls, but other than that, it is the same when it comes to LIs)
Renders are great, everything just looks so good. Compared to others games on this site you sometimes forget that you are playing an Adult game.
Updates are big, but take some time in between. Which is fine by me, I played 0.4 in one go and played a few evenings in a row for 2-3 hours each, which means, there is a lot of content and Updates seem to be big. 100% worth the wait.
The only thing I can find which botheres me a bit (and this is pure personal opinion and nitpicking): The Alien-Attack did not really fit. Yes, this game has Horror Elements, but the Alien Attack really seemed out of place when it comes to when it happened. Personally, I hope that this will have something which fits into "the big picture" (I dont know, some form of malfunction on the Eternum-Servers or something like this). But if not, no big deal!
5/5 Stars, well deserved, easily one of the best, if not THE best game here.