I’m at 98% trophy (missing the one you get at the beginning of Ion’s side in Phase 1 -_-) and just cleared the game with the true ending so might as well write down my thoughts while the iron is hot.
Ar Tonelico 3 was a turn for the worse after AT2, so I was initially hesitating on Ar nosurge. Thankfully, it turned out much better than expected, and brought back everything I liked about the Ar Tonelico series. Anyone who enjoyed Ar Tonelico 2 would like Ar nosurge, since the latter feels like an evolved version of the former. The problem is that to feel the full impact of many events in Ar nosurge, reading Ciel nosurge beforehand is necessary. While the former is good game on its own, it’s because I read Ciel up to chapter 10 beforehand that made Ar’s scenes and characters leave such a strong impression. There are small things that mean a lot to those who played Ciel, as well as characters that played an important role there but show up later here.