Anxiety

Related:
* Morale - may superficially overlap
* NPC anxiety - when NPCs suffer from this.

This is often target of ridicule from players who believe the characters are wussies and they personally wouldn't be afraid in the situation or anything or something in that vain. Shows how detached players tend to be and how little they really immerse themselves into the game or even understand the situation.

Notes:
* Fear is part of this as both produce the same effect, only that with fear the source can be identified clearly (and therefore avoided), while anxiety may not give any good ways to fight it.