Games : Title of old fps, by description

sorry for my bad english.

I'd like to know the title of a very old fps, 3d, I used to play long time ago. I remember the player was a soldier who have to kill enemies in a certain place. Visual was in first person, but the weapon was not visible, only the HUD pointer, at the center of the screen.

Enemies could kill you very easily, in that case the controls would pass to another soldier who was stepping alongside the first [there were maybe three in total].

Another thing I remember: when the player opens a door, I have to keep pressed a button or a key until a "progress bar" completes around the HUD pointer.

It was not a "shoot everything you see" game with lots of ammo: enemies stayed hidden quietly in certain places, I had to find them one by one and shoot them.

I hope you can help, thank you.