Battlefield 1942 Desert combat for me, also Operation Flashpoint is a great game and gets tougher when playing on internet, as for mod based games HL hostile intent which is much better than CS. Day of defeat is also a kick ass game

Operation Flashpoint is by the far the greatest game. For those who haven't yet played I suggest you do and do it quick. Most realistic game out there.

-I chose BF 1942
-BF Vietnam for some reason i dislike
-Medal of honor is a disgrace because one man could defeat an entire german army, its a nice fantasy game but it shouldn't be made for WW2
-Never played Age of empires
-Civilization 1-3 sucks big dick primarily because you need the citys to make stuff and more importantly because YOU CANT UPGRADE YOUR F&#$ING MILITARY you have to build new units to have an advantage in combat.
Why the F^$@ did you not include call of duty.
It is my fav. game
the most realistic game is probably Brothers in arms.

Medal of Honor

Btw, you forgot to put Operation Flashpoint there .

i voted for medal of honor, but i think that Call of Duty is better