The safest method is to purchase Call of Duty: Modern Warfare 2 (2009) on Steam .
: Yes, but limited. IW4sp supports some custom mods via the mods folder. Check the XLabs forums for specifics. Iw4sp.exe Download -FREE-
Communicating with the Steam client (or other official launchers) to verify ownership. The safest method is to purchase Call of
A: Yes. The free iw4sp.exe patch removes the Steam requirement entirely for single-player. You can even move the game folder to another PC and run it directly. Iw4sp.exe Download -FREE-