Some winning conditions include defusing a bomb, planting a bomb and preventing it from being defused by the other team, rescuing all the hostages on a map, preventing the hostages from being rescued, and defeat all the members of the opposing team.
There are many types of objectives that a map can have, but the ultimate goal of the game is to win more rounds than the opposing team, which is accomplished by fulfilling the map's winning conditions. The aim of playing a map is to accomplish a map's objective. Counter-Strike: Source is a remake of Counter-Strike, and consequently retains its team-based objective-oriented first-person shooter style gameplay.