Redfall - Arkane's vampire hunting co-op opus

So much this. Don’t skimp on prototyping. Take time early in the project to really figure it out and establish direction, tone, and where you want to be. And then trust in that while developing, even during the rocky shit part of mid dev when nothing works and everything is ugly. Course correct where needed, but don’t go into production without a clear idea of what you want on the other side of it.