As you know we have alteriwnet to play mp unfortunatelly alteriwnet doesnt support co-op.
IF YOU HAVE ALTERİWNET
1.
Download steam and get account GetSteam (
steam must be running while playing)
2. Copy your mw2 and past it to another driver .(--->D:my program files/mw2 not like D:/mw2)
3.Then delete everything related to alteriwnet in your copied mw2.
5.
And dowload this file HotFix then put that into your copied mw2 as well. 6.Then go to your copied mw2(location must be like D:my program files/m2 not like D:/mw2)
and find "TeknoGods_MW2SP.exe" and make 2 shortcut of it to desktop..
7.Then go to desktop and rename one of the "TeknoGods_MW2SP.exe"s shortcut as "Client mw" and rename other one as "Host mw" ..
To Host Game
1.Tell your real(isp ip) ip to your partner .
2.Then run "Host mw" then chose "special ops player" then "2 player online" then "chose map"
then :D wait in lobby untill your partner connects your game.
To Join Game
1.First you need to know host's ip.
2.Then right click on "Client mw" then click on properties and add that " --ip=host ip here" ( without quotation marks)..
3.Then run Client mw and "chose spec ops" mode,then "2player" online as soon as you clicked on "2player online" press "F12" untill you join host's loby.