Astral Chain takes a lot of
inspiration from Evangelion. Just in the very intro alone, with the activation sequence of the Sword Legion, is straight up the activation test episode 5 from Evangelion, down the cybernetic mech monster beating on the glass while the sinister commander looks on (though dispassionately like Rei does in a repeat of that in a later episode).
The whole "weird apocalypse that forces humanity into last cities" setup (redshifting/the Ark in Astral Chain, Second Impact/Tokyo-3 in Evangelion), Yoseph as a sinister bespectacled bearded scientist/commander of "NEURON" (aka Gendo Ikari, the sinister bespectacled bearded scientist commander of "NERV"). The Legions themselves are extremely EVA-like in their sharp, angular design and screaming mouths, and as cyborg versions of the main enemy monsters of the game, with their "armor" actually being restraints to keep them under control.
Also the weird cabal of prophets who berate Yoseph early on are straight up SEELE from Evangelion, down to being data projections on geometric screens who complain about how Yoseph is wasting their time and money.
Oh, and in case it isn't made obvious enough, one of the first preset color schemes you can unlock for your Legions are EVA Unit 01 colors: