The Steam valve is an item celebrating the launch of RuneScape on Steam. It is obtained by logging in to the game (via any method - through Steam or otherwise) between 14 October and 14 November 2020, with at least 100 total level and completion of the Burthorpe path. It can be opened to get a variety of items, including the commemorative Steam valve. It is awarded along with the achievement Steam Release.
It can be opened with at least six free slots in backpack, destroying the valve in the process. Opening it successfully yields the following rewards:
Ironmen will only receive the commemorative Steam valve and 500 oddments from the valve.
Some players have received multiple steam valves, in which case attempting to open any after the first yields a message that "You have already opened this item."
This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!