Fallout: Ghosts of Baja
The official currency of the Vault
Since everything (food, clothing, shelter, medical services) needed to live is provided by the Vault, the Vault Credit gives each citizen some leeway to change things up a bit and purchase goods and services that makes life worth living.
Typically those purchases include fancier food items or snacks, soft drinks or entertainment.
The Vault Credit exists only as a virtual sum stored on the individual citizen’s PipBoy, and theft is nearly impossible to carry out since each Credit is unique and traceable.
Informally nicknamed “vaultbucks”