Eden's Zero is an action-adventure game with Musou-like mechanics. Basically, it has a Dynasty Warriors-like gameplay, with the story and characters of Eden's Zero.
The gameplay is really just like any Musou game, as players fight through waves of enemies with their parties. Players can the charge up their special attacks as well as use items to boost or heal.
Graphics is quite good. Not the best, but good. Controls are a bit clumsy though, as the lead character somehow does not attack my intended target but another one. In other words, there is a bit of an accuracy issue.
As for the story, there isn't anything much to talk about, as it simply follows the events of the anime, and characters are unlocked as the story goes along. It's quite F2P friendly too.
Overall, not a bad game. It's fun, and the Musuo style feels nostalgic in this sea of turn-based gacha anime games.