Children of an Elder God by John Biles and Rod M.

Another review!

I liked Children of an Elder God quite a lot, but I do need to warn you about some of the content.

• Setup: Neon Genesis Evangelion with the Pseudo-Christian parts replaced with the works of  Howard Phillips Lovecraft (and successors).
• Execution: Like I said, I liked it, but it is fairly faithful to both universes, so not exactly kid friendly all the time.
• Swearing: Bad, the main characters are both teenagers and soldiers, and it is handled mostly realistically, F-Bombs are dropped infrequently, as well as D-words and S-words, both English and German.
• Violence: Again, the Cthulhu Mythos and Neon Genesis Evangelion, together, portrayed fairly faithfully, so you should not be surprised that body horror, blood, and eldritch abominations being eaten by humungous mecha abound.
• Religious/Others: Talk of eating souls, "beings" called Outer Gods, talk of cults worshiping beings of great power, talk of being possessed by some of said beings, The whole Violator incident (and its aftermath), general amorality, none of this is portrayed as being good or right, although the soul eating thing is portrayed as a necessary (or at least unavoidable) part of getting stronger in order to defend humanity.

I did like it, and it is probably less disturbing than NGE apparently got near the end, but this is based on the work that brought you Post Apocalypse Stress Disorder (my nickname for it) and eldritch mecha, so if you take offense at enough of the previously listed things, you should probably give this one a miss.
Update: Last chapter has been published, but not available from the main page.