Topic: Kongregate Multiplayer Games /
[Misfortune] Complete guide
To upgrade steam weapons you need to meet the engineer. He will give you some recipes, you can buy most things in the general store or guns store and the mechanical parts from the beggar, whom you meet in random (as far as I know) quests.
1 pressure valve = exchange for 2 kitchen knives (rusty knives)
1 steam gauge = exchange for 1 rolling pin
1 coiled spring = exchange for 1 cooking pan