Since Half Life 2 is the only proper game( a masterpiece really) Valve made in the last 6 years(Left4Dead, TF2, Portal are all flimsy arcadey onliney crap they keep peddling for money) is it possible to upgrade HL2 so it can have dynamic lighting and shadows like Left 4 Dead has, it really makes a huge difference as can be seen in Left 4 Dead.