Grave is a game that understands there are multiple kinds of fear. One is more a feeling of anxiety, which you will find in games with eerie surreal landscapes but without much action, or upon entering a Wal-Mart. Then, there is a much more nocuous, immediate kind of fear, where you feel your life is threatened and your fight-or-flight reflexes kick in—also, like entering a Wal-Mart. Well, Grave ties both those types of fear in a pretty little bow with its day-night cycle, which actually sounds horrifying and not pretty at all. The way it functions is that during the…