SpaceTime is a role-playing game published by Blacksburg Tactical Research Center in 1988.

In physics, spacetime is any mathematical model that combines space and time into a single interwoven continuum. The spacetime of our universe is "usually" interpreted from a Euclidean space perspective, which regards space as consisting of three dimensions, and time as consisting of one dimension, the "fourth dimension". By combining space and time into a single manifold called Minkowski space, physicists have significantly simplified a large number of physical theories, as well as described in a more uniform way the workings of the universe at both the supergalactic and subatomic levels.