t1337Dude 10 Posted June 7, 2012 I own my copy of Operation Arrowhead through Steam. It worked fine yesterday, but today it started giving me a fuss about having an invalid serial key. I reran the Steam installer scripts and the game will properly start, but now I get this error when I try to join any server. If I verify the integrity of the game cache, I then get kicked out for an "Invalid serial key" on startup. And if I rerun the Steam installer scripts it simply gives the error in the picture again. I've already tried starting the Steam and the game by using "Run as Administrator" and it didn't help. Any suggestions? Share this post Link to post Share on other sites
