A virtual space may be presented within a plurality of virtual environments provided by different platforms without requiring idiosyncratic APIs associated with the virtual space for each different platform. An API adaptor module may be configured to facilitate interfacing between a single virtual space API and platform APIs associated with two or more different platforms. A space module may be configured to execute an instance of a virtual space, and to implement the instance of the virtual space to determine view information defining views of the instance of the virtual space for presentation via two or more virtual environments provided by the two or more platforms. Facilitating user interactivity with the virtual space via a given virtual environment provided by a given platform may include interfacing between the virtual space API and a platform API associated with the given platform.