[Misiur]

Iterator always will be the fastest - just remember to add and remove values from it to not get wonky stuff. You've said that you'll do it for 30 systems. I guess a player can be at most in 1 of those at once (i.e Player in GunGame can't play WarGame at the same time). If you are using latest YSI, you can reduce memory used too:

pawn Код:

enum E_GAME
{
     E_GAME_WAR,
     E_GAME_GUN,
     //etc.
}
new Iterator:GamePlayer<_:E_GAME, MAX_PLAYERS>;

//then
foreach(new playerid:GamePlayer<_:E_GAME_WAR>)

This way you'll only use E_GAME + MAX_PLAYERS cells, not E_GAME * MAX_PLAYERS.