I wish they made the Tank pack an Achievement like smash a 100 cars and it shoukd be called " Car Smasher" And the Title should be "Well this is Grand Theft Auto"
Man if they add like a mutated monster or small monster that you can spawn it would be cool and gory if there's people walking around i would've love this.
I know a way you can fix this: reinstall the game and go in and when youre done playing click the menu button and go to the main menu. Then, you should be able to go back in.