I also feel bad that her creator is again a very typical trope of a perv... but I mean... I still believe he could still plays a major role on creating the crossover series in order to stop Altair, speaking of Altair the last scene is just so touching... and I really hope Blitz doesn't die... also we see a flashback on Blitz's story where he needs to kill her daughter... the part where she slightly grins is also skeptical in my opinion.
I would call it hentai rather than ecchi since ecchi is just mere not safe for work content that is barely over the mature line but not to that extent where it shows the unspeakable which is also the type of anime content that is on my "final frontier" of accepting it (Take Kill La Kill for an example), anime that contain moderate amount of ecchi is fine as long as the plot is good and fans do care about (Again, like Kill La Kill... sort of), hentai on the other hand is out of border and are those that really just for the fanservice and it's popularity tends to be gain from fanserivce rather than how good the anime/game's plot is (this is how the meme "I watch it for the plot" is about), but we may never knew since it's literally impossible for Re:Creators to show it. I even believe what we have seen in the OP is only just scratching the surface.
Tl;dr
Ecchi tend to rated M in ESRB
Hentai tends to rated AO in ESRB
I...kind of forgot her game is on console or not... this does matter at least in the US since AO game can never be on home consoles. Japan only titles... well... I'm not so sure. What I saw in according to the sub her game is rated X.........
No... Japan's CERO rating system does not have X rating
But my favorite part though...
Seeing my love/hate character Magane topless and her body/hips...