In a typical RTS game, it is possible to create additional units and structures, generally limited by a requirement to expend accumulated resources. In a real-time strategy game, each participant positions structures and maneuvers multiple units under their indirect control to secure areas of the map and/or destroy their opponents' assets. The term 'real-time strategy' was coined by Brett Sperry to market Dune II in the early 1990s.
By contrast, in turn-based strategy (TBS) games, players take turns to play. Real-time strategy ( RTS) is a subgenre of strategy video games that do not progress incrementally in turns, but allow all players to play simultaneously, in 'real time'.