If you find the 400 million number hard to swallow with the "only 150 employees" narrative, the credits list
1,972 professional credits.
Voice actors, localization, quality assurance and quite a few outsourcing studios listed like Little Red Zombies, WETA Workshop, Pipework Studios, Lakshya Studios, Red Hot CG, Glass Egg. There a ton of them and even Nixxes is listed. People are credited for working on a PVE mode.
Goodbye Kansas Studios AB are curiously not listed, the Swedish studio that created the cinematic CG for the game. They make CG for EVERYTHING. By the looks of it, they might have scrubbed their homepage of Concord references. Linkdin & Facebook posts are still there.
This is quite the rabbit hole, found artstation posts where artists show assets used in the trailer and they are not featured in the credits. But they are listed as a partner studio in Helldivers 2's credits.
The official game credits for Concord released on PlayStation 5 in 2024. The credits include 1,982 people.
www.mobygames.com