Desync in coop missions from disk copy

[McKale]

I was playing with friends on the first coop mission. I got a desync error at the second cut-scene.

My two friends have the steam version while i am using a CD copy from when the game first came out.

Their game kept going and I was forced to quit because the cut-scnee never triggered for me.

Is there some kind of fix or do i need a steam copy?

[PhilipJFry]

please read the red text above
you need to post logs and properly describe your issue (first mission of what? vanilla or FA?)

also you don't need to use steam - the retail version works just fine

Spoiler: show

should you decide to use steam you don't even have to buy the game if you have a retail copy - you can just use your retail cd key to get a steam copy for free