this game feature is
shader 2.0 and 3.0
particle system for steam and fire
iron sight weapon
save and load anywhere in the game.
the game runs at 60 fps on old Nvidia drivers. I have test this game on new ones like September 2015 update driver and the driver seem to be a bit buggy with perfomance. so I roll back to driver 344.75 and perfomance works fine. one thing I learn about driver update they can be buggy at times and even cause your web browser to crash. so I was not too surprise to fine a performance issue with this game with the new drivers.