Do your research on this game before you buy or use things in it. There are different weapons that you may or may not like. Research them before buying or upgrading them. For example; The flamethrower might look great, but I've personally found it to be completely useless. Also with the rooms that require Power Nodes to open. Some of them have really great stuff inside, but others have useless items. Don't waste your nodes on useless rooms.
Added by: Forgoten_Scars Feb 27th 2011, ID#7057