1. A system configured to facilitate data model substitution related to one or more pre-existing data objects in an expression of a game environment, the system comprising: one or more electronic storage media configured to store one or more pre-existing data objects to be expressed in a particular expression of a game environment at a remote device, the one or more pre-existing data objects being subject to logic that controls behavior of the one or more pre-existing data objects; one or more processors configured to execute computer program modules, the computer program modules comprising: a data model substitution module configured to: obtain first logic for the one or more pre-existing data objects, wherein the first logic causes a first behavior of an expression of the one or more pre-existing data objects during gameplay via the particular expression of the game environment; and, cause the first logic to be communicated to the remote device such that the first behavior of the expression of the one or more pre-existing data objects is caused during the gameplay via the particular expression of the game environment.