In Civilization V, the player leads a civilization from prehistoric times to the future on a reproductive map and tries to achieve a series of different conditions of victory through research, exploration, diplomacy, expansion, economic development, government and military conquest. The game is based on a brand new game engine with hexagonal tiles instead of the square tiles of previous games in the series.  Many elements of Civilization IV and its extension packages have been removed or modified, such as religion and espionage (although these have been reintroduced in their later extensions). The combat system has been overhauled by removing the stacking of military units and allowing cities to defend themselves by shooting directly at nearby adversaries.  In addition, the maps contain computerized city-states and non-player characters available for trade, diplomacy and conquest. The boundaries of a civilization also push one tile at a time, in favor of more productive tiles, and roads now have maintenance costs, so they are much less frequent.  The game features community, modding and multiplayer elements.  It is available for download on Steam. As in previous games, there are many ways to achieve victory. The player can focus on scientific research and become the first to assemble and launch a spaceship and win the space race. The player can focus on a diplomatic victory that requires the support of other civilizations and city-states to the United Nations.
In the new cultural system of civilization V, composed of “trees” of social policy, the cultural victory over the Brave New World Expansion Pack included the filling of five of the ten “trees” and the completion of the Utopia project (reminiscent of the secret project to Ascent Transcendence in Sid Meiers Alpha Centauri).  Science has always been our personal favorite on the resources of the winning condition, thanks to this ah so satisfying feeling of evaporating through the tech tree towards late play, and future payments.