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Rockstar Make Game Modes Files Loaded from R* Servers .
in 1.06 , Rockstar Patch tunables.json
which make cheaters can't edit Bad Sport Days , Cash , XP , Other Things like make everything free ..
and they patch it by making it load from R* Servers ( tunables.json is a web file because it javascript )
then someone genius found url for tunables.json in R* Servers : You must login or register to view this content.
with this file , Rockstar can make discounts and double RP or Money ..
in the file there something about CnC .

"MP_CNC":{},"MP_CNC_TEAM":{}

then i found a script file about tunables .
here some codes :

MP_CNC.
MP_CNC_TEAM_COP
MP_CNC_TEAM_VAGOS
MP_CNC_TEAM_LOST
MP_FM
MP_FM_DM
MP_FM_RACES
MP_FM_RACES_CAR
MP_FM_RACES_BIKE
MP_FM_RACES_CYCLE
MP_FM_RACES_AIR
MP_FM_RACES_SEA
MP_FM_MISSIONS
MP_FM_SURVIVAL
MP_FM_BASEJUMP

CnC will be different world than Freemode .
and i'm right ..
because in the codes ..
there MP_FM_DM and MP_FM_RACES
Deathmatchs and Races are a part from Freemode .
but CnC Aren't a part from freemode
and you can choose if you want to be with Vagos or Lost or Cops
and there already a file called network_options.dat
have some codes about CnC :

<data option="OPT_TEAM_NUMBER" total_number="3" label="TEAM" default="0">
<selection_string>
<options>
<option name="TEAM_COP"/>
</options>
<options>
<option name="TEAM_CR_GANG_1"/>
</options>
<options>
<option name="TEAM_CR_GANG_2"/>
</options>
</selection_string>

you can choose 3 teams ..
Cops , Vagos , Lost
and there a file called Missions.xml
have more infomotion about CnC
like if you be a cop , you can Arrest Criminal Players .

Source: You must login or register to view this content.

Nice find! Sounds promising, hope this is free though.