If you are into flight combat sims your gonna love this one.
http://www.overflandersfields.com/For the princely sum of $30.00 you can get your sticky mits on the best WW1 flight sim out there with stunning graphics and realism.
The sim is based on Microsoft Combat Flight Simulator 3 which you will need to obtain and install on you PC prior to installing OVER FLANDERS FIELDS: BETWEEN HEAVEN AND HELL
http://www.youtube.com/watch?v=VJHv8fGJjBY&feature=relatedTrackir4 is a head tracking system that when configured for a 3d sim or first person shoot-em-up that is built around the system, it allows you to track the enemy instead of you being in a fixed forward view mode.
http://www.naturalpoint.com/trackir/02-products/product-TrackIR-4-PRO.htmlWhat this means is that your head movements are tracked in the game
in real time! This is just aw-some!
In a flight simulator this means you can track your enemy in the sky independent of your aircraft which takes things to a whole new realm of realism
If he dives down and to your right and you follow him with your head, the image in front of you pans across your starboard wing following your target as in real life.
This is so addictive that your missus will end up hiding your keyboard and joystick!
There are tons of videos shot by pilots during their sorties on youtube, just look for 'Over Flanders Fields trackir4' to get a feel for this amazing set up
A friend of mine actually felt airsick
when he first tried this on my computer but this soon passes as you orient yourself to whats on the screen, it really is a weired feeling!