Have ran into a problem with GR, me and a friend are playing through the campaign on CO-OP. We have reached Valiant Hammer, quite near the end (or so we think) we died and the game froze while loading the checkpoint. Now whenever we try to load that checkpoint the game freezes. The only other level we can do is the level prior to this one, even after completing that we don't have the option to do the next mission. So I seem to be a little stuck?
Has anyone else encountered this problem? Or do they know a fix for it?