PSNStores.com says the following:
"It took me a little over 3.5 hours to complete this game from start to finish. And in that time I collected 97% of the items. I don't think I will ever go back and get those last few items, but this doesn't mean I didn't have fun playing it. It is hard to look past some of the technical issues and the occasional level restart due to bad checkpoints. So I would truly only get this if you are a fan of RTS games."