How does one player beat another (when does the game end)?
While we have a variety of end-game conditions for the single-player campaigns, we have two primary modes for multiplayer games. The first mode is: your game is over if you lose your ability to attack or produce units at any point in time. This yields interesting strategies where one player can be losing in the past, but rush in the present and still win. The second mode is: your game is over if you lose your ability to attack or produce units at the oldest position on the timeline, as it is impossible to recover from this. However, this second mode can obviously add time to the end-game.
