SC2Mapster

How can i end the game if somebody leave and there is no longer any opponent? (can be 1-3). Any normal melee triggers that can be used for custom games?

How about the end game trigger if player leaves as event? might have to use some conditions and varables

Yeah, a very simple way of doing it is to create a trigger registering when any player leaves the game, then counting all active players left and end game for the last player if he is the last player (I do assume or recall, that Active Players is a group returning all human playing players in game still playing).

So, as an example:

Last Player End Game
    Events
        Player - Player Any Player leaves the game with Any
    Local Variables
        activePlayers = (Active Players) <Player Group>
    Conditions
        (Number of players in activePlayers) == 1
    Actions
        Game - End game in Victory for player (Player 1 from activePlayers) (Show dialogs, Show score screen)