Gravity
     Host  your  own game and make sure your console command window is
set  as  the  button  ~, press it and a window will come down, type in
sv_gravity  ***, fill in the *** with as many numbers as you want, the
normal gravity is 600 -700. have fun.

Heavy powered sniper
     Join a game that has a level with a stationary machine game(total
war).  join  the  game as a sniper walk up to the gun with your sniper
gun  out,  gain  control  of  the machine gun and just sniper in, your
accurracy will be a lot better with this.