Blending single elimination, team-based gameplay with the notion of an economy to produce an online action experience of incredible depth and realism, Counter-Strike is the most played multi-player online action game in the world. With Counter-Strike: Source, the now legendary game has been given a complete overhaul, with graphic enhancements such as higher polygon models, shadows and reflective water to add dimension to the new characters, items, and environments. CS: Source also contains all new maps.