verify your game files
To verify your files if you bought the game thru Steam
(launch Steam as Run As Administrator)
go to your Steam games library
right clik on far cry 3
select properties
select local files
select verify Integrity of game cache
it takes a few min to do but its faster the redownloading your entire game , if its only a few files that were corrupt or installed incorrectly .... this in many cases will fix your problems
If you have the U play only Version of the game you can also verify your game files with U play (again launch Uplay as Run As Administrator)
if you have the game via u play only here are instructions how to verify your game files thru their client (scroll down to the bottom of the following page )
https://support.ubi.com/en-US/FAQ/60...0000000ee85CAA