Get to Freek'adel'ka's RUST room and obtain the belt artifact.
To do that, take the rusty knife and go to the long corridor that leads to the forest.
Then, go to the long hallway and take out the rusty knife. Then into that staff only room and if you have the black key artifact. open it.
If you don't, leave trash as close as you can to trigger Mr Cleany to open it for you. Then go into the door.
Then go to the right while holding the rusty knife artifact. Then you will be in freekadelka's room. I recommend running straight until you see a way to the left. Then just run straight until a wall meets you. Then turn right and go to the second way. Then put rusty knife in your belt by holding tab and pressing the middle mouse button while holding the rusty knife. If you need more help in this game i might help.