Keys are a special item found in most levels of Robbery Bob. They appear as gold-colored stereotypical keys that when used, will unlock a single locked door. Each key can open one door independently of where the key or the door are.
A simple rule of thumb that is worth remembering is that "Any key can open any door".
This means that a key that was found in the living room of a house can open the door to the toilet for example.
ObtainingKeys are collected in a similar way to loot, by simply approaching them.
When Bob collects a key, the text "FOUND KEY" appears and the key counter appears on the right side of the screen.
Keys can alternatively be skipped by using the Lock pick, for a cost of 150 coins per use.