Escape from War Headquarters

An experienced fighter found himself imprisoned in his own headquarters. All the doors are locked as soon as the enemy has crossed the threshold of the base. Now, in addition, to find a way out, you must not be captured by the enemy. To do this, carefully search the area and find useful items, they need to solve the puzzle, which can be used to open the door. Items can be combined with each other to get a more useful thing a valid, for one or another riddle.