Which Steins Gate are canon?
It can’t be considered Canon because the source material (Visual Novel) doesn’t have movie’s story in it. But it can’t be considered non-canon either because that movie shows what would actually happen in the Steins;Gate worldline after the events of the anime. So, you can call the movie Pseudo-Canon.
Is Steins Gate Zero canon?
Aside from being considered non-canon, both the movie and OVA are set on the Steins;Gate worldline, the worldline created when Okabe saved Kurisu at the end of the original series. Apr 5, 2018
Are Steins Gate movie canon?
Steins;Gate movie is not canon to the story and it breaks quite a few rules that were established. It doesn’t mean that it isn’t worth watching, however. It is a nice story between Okabe and Kurisu for those who want more and it should be seen as such.