private int cycle = 0;
	public void tick(){
		switch(cycle) {
		case 30 * Miscellaneous.MINUTES:
			// Run garbage collection
			System.gc();
			cycle = 0;
			break;
		default:
			cycle++;
			break;
		}
		for(Player player : players) {
			if(player == null) {
				continue;
			}
			// process events here (cycles every 500ms)
			player.process();
		}
		// XXX process NPCs
	}