I found this game challenging enough upon first starting, that I replayed the first level many times to figure out how to play and to collect the necessary funding to upgrade my guns. When I went to upgrade my second gun, the game crashed during the save, and I lost ALL my progress. It was like I hadn't played at all. I reported the crash via Sony when prompted to do so. I was not going to try again until after a patch came out, so I wouldn't lose all my progress again. There has been no such patch and so now I have a game I have wasted my money paying the full, debut, price on that I am afraid to even play for fear I'll lose my progress again, wasting all my investment in gameplay. I can't believe any reputable developer wouldn't maintain a backup of the game saves to prevent this exact sort of scenario from happening.