Ok, OK I know it's a bit old school.... but does anyone still have Half Life 2 on their computer? If so and you want to try a mod to HL2 that takes every last drop of your sight and sound senses to win....... try and down load a mod called "The Hidden - " source. So if you want to find yourself face to face with your monitor looking for any minute little movement or listening for the faintest or smallest or slightest sounds of footsteps out of you're headphones or speakers...... give "The Hidden" a try.
If so, just search Google.... "The Hidden source," down load it (it's free) and install. Then let your Steam account know you have installed a non-Steam program. (i forgot how i did this) Find an online server, unfortunately not many listed but give it a go!
What is interesting about this game, the person who is playing as "hidden" can take out all 8 fully kitted out soldiers with just a knife. It's intense!
I'm so wired after playing this game I can't sleep for an hour!
NOTE: Nothin' like "Pig Stinking" Beams with a big kick ass Croc Dundee knife..... hey Beams?