Some TAG scenarios are "close-ended", which means there is a specific way that a player (or group of players) can win the game and cause it to end. Other scenarios are "open-ended", which means they will continue until no one is interested in playing any longer.
Most closed-ended TAG scenarios use the same win condition. The game ends when one nation conquers the world. In particular, to win the game a nation must achieve the following conditions for two months in a row:
No other non-neutral nations may control any provinces or cities. Control of a province or city is given by garrisoning the province.
The winning nation must have twice as many NPs as all the other non-neutral nations combined.
The win condition is checked at the end of each month.
If a scenario uses an alternate win condition, it will be stated in the scenario description (see Scenarios).