how long does it take to get to end ? wit the version 0.3 ? i want to play this badly but dont want to get exited for 1 hour of playing
also is the once a lifetime game worth playing too ?
YMMV but in my experience...
0.1 - 3.5 hours to finish
0.2 - 3.5 hours to finish
0.3 - 3.5 hours to finish
Note that this was with a walkthrough and with me trying to take my time but failing and going back to my usual reading speed in some parts of the story (I read quite fast tbh).
As for "Once in a Lifetime," my advice is to play that game first before playing this. Granted, it starts off slow and the renders kinda look downgraded compared to Eternum, but the story is decent enough if you're patient with it and the writing and pacing improves quite fine per update.
The reason for the advice though is that the flaws of that game (i.e. lack of music in most cases, meh graphics, not every girl getting proper development or screentime) really become apparent if you start off with Eternum, and might deter you from continuing if you're looking for the kind of quality Eternum has. Not to mention some of the callbacks from OIAL in Eternum might fly over your head, especially if the inevitable cameos start popping up in future patches.