docs: function version2GameStage(str) {
      var tokens, stage, step, round;
      tokens = str.trim().split('.');
      stage = parseInt(tokens[0], 10) + 1;
      if (isNaN(stage)) return false;
      step  = parseInt(tokens[1], 10) + 1;
      if (isNaN(step)) return false;
      round = parseInt(tokens[2], 10) + 1;
      if (isNaN(round)) return false;
      return {
          stage: stage, step: step, round: round
      };
  }