use your firewall to block all exe files in the game’s intsall directory from going online.
blocking program to access internet can be done by setting in windows 7 firewall. Step by step to block program using windows 7 firewall :

1. Open start, write firewall in search program and files

2. Choose allow a program through windows firewall.
3. In new window that appear choose ‘Change Setting’ to enable you to edit firewall rules for each program.

4. Find program names that you want to block, for example Pro Evolution Soccer
if you want to block the program from accessing the internet, make sure the check box is empty.

if you fill the check box before program names, it means you allow this program to access the internet. Removing the check in the check box before the program name means you block/disallow this program to access the internet.