Ok so i've found a german guide for crazy steamer and i decided to translate it so everyone can use it (majority of players).
here it goes.
At the start of the dungeon you're gonna find yourself on a train.
1. At the begining you have to lure and kill all mobs
*You dont have to kill all the mobs, how many? its still a mistery.*
2. After you killed those mobs you have to kill the hounds and floaters
*After you've killed them you have to return to the start, you have to kill Steam Copter there*
3. After you killed Steam Copter, return to the front of the train and destroy the wall.
*When the wall is down proceed forward and kill the first boss, open chest and proceed*
4. Find a little mob called "Steaky" and kill him, hurry and kill the wall. if you dont make it in time the Steaky will respawn and you're gonna have to repeat this part all over again.
5. When you pass the wall you have to run straight forward, at the end of the train hides the last boss, he has his own arsenal of special skills so be careful. *WARNING* will display before he uses any. (Flamethrower/Mines) are his special skills.
6. Kill the boss, open the chest and you've succesfully finished the dungeon, gratz
Ok i hope it helps you guys, credits go to McDragon
Its my first guide, so be easy on me