Is there supposed to be a pause menu (to pause, restart a level, or quit out of a game mid-mission)? In the controls section of the manual, it does say that the escape key is for the pause menu, but nothing happens when I press (or hold) esc in the game. Neither with any F-keys or pause key.

It would be weird if it's intentional; maybe it's a bug, or a problem on my end.

Edit: That's odd. It's bound to the j key. I looked through options.cfg and there it is. I don't think I changed it to that, but problem solved. :)