Only place to get this mission failure condition:
 976352  6625`           if( 268@ == 1 ) {
 976366  6639`             00BE: text_clear_all ;
 976368  6641`             00BC: show_text_highpriority GXT 'MUS1_21' time 5000 flag 0 ; // ~r~You wrecked the party!

Only place where 268@ = 1
 975061  5334`         if( not 268@ == 1 ) {
 975079  5352`           if( 00EC: actor $PLAYER_ACTOR sphere 0 near_point 34@ 35@ radius 162@ 162@ &&
 975098  5371`               02E0: actor $PLAYER_ACTOR firing_weapon ; ) {
 975110  5383`             268@ = 1 ;
             `           }
             `           else {
 975128  5401`             if( 0118: actor 55@ dead ) {
 975140  5413`               268@ = 1 ;
             `             }
             `             else {
 975158  5431`               if( 051A: actor 55@ damaged_by_actor $PLAYER_ACTOR ||
 975166  5439`                   074F: actor 55@ ped_event == EVENT_GUN_AIMED_AT_31 ; ) {
 975180  5453`                 268@ = 1 ;
             `               }
             `             }
 975187  5460`             170@ = 0 ;
 975198  5471`             while( 001D: 61@ > 170@ // (int) ||
 975206  5479`                    not 268@ == 1 ; ) {
 975224  5497`               if( 0118: actor 62@(170@,21i) dead ) {
 975240  5513`                 268@ = 1 ;
             `               }
             `               else {
 975258  5531`                 if( 051A: actor 62@(170@,21i) damaged_by_actor $PLAYER_ACTOR ) {
 975277  5550`                   268@ = 1 ;
             `                 }
             `               }