CS GO Crosshair:

Copy to console:

cl_crosshair_drawoutline 0;cl_crosshair_outlinethickness 1;cl_crosshaircolor 1;cl_crosshairdot 0;cl_crosshairgap -1.5;cl_crosshairsize 4;cl_crosshairstyle 4;cl_crosshairthickness 1

L4D2 Crosshair:

cl_crosshair_blue 255
cl_crosshair_red 0
cl_crosshair_green 153
cl_crosshair_alpha 255
cl_crosshair_dynamic 1
cl_crosshair_thickness 3

L4D2 Third Person:

Bind "ALT" thirdpersonshoulder;
c_thirdpersonshoulderoffset 5;
c_thirdpersonshoulderaimdist 720;
c_thirdpersonshoulderdist 40;
c_thirdpersonshoulderheight 5;
cam_ideallag 0;