Certain items are unbuyable from the supply depot like the gravitron charge or the shadowtech alchemer mk2, i encountered a bug on mission 6-1 where there is no enough keys to complete the level and even when you rescue everyone the elevator gates will remain closed, also at the first level before the rescue camp sometimes the path that takes you to the camp won't work, on a mission where you have to rescue a knight on the scarlet fortress, on the third level on the mission time enough at last, the name is m.scarlet_fortress_grim_gallery_ethernalstudy [IMG]http://i41.tinypic.com/33xy49y.jpg[/IMG]