1 - there are a lot of spanner wrenches on Mars. every zombie has one and is trying to wrap it around your skull. oh, and you can't pick it up when he is done. 2 - space marines outnumber techies and scientists about 600 to 1. some research station, unless the experiements were carried out on the space marines..... 3 - there are more hidden closets and cubbie holes than Michael Jackson's mansion. 4 - don't touch anything, need that armor? don't touch it because the baddies will...