Rudimentary implementation of most T2K events

Account for second enemy bank's launchtype behavior differing
Moved random explosions to event 99 to match T2K
Handling for events 59, 68, and 85

src/tyrian2.c

@@ -3832,8 +3832,18 @@ uint JE_makeEnemy( struct JE_SingleEnemyType *enemy, Uint16 eDatI, Sint16 unique
 
 	enemy->launchfreq = enemyDat[eDatI].elaunchfreq;
 	enemy->launchwait = enemyDat[eDatI].elaunchfreq;
-	enemy->launchtype = enemyDat[eDatI].elaunchtype % 1000;
-	enemy->launchspecial = enemyDat[eDatI].elaunchtype / 1000;
+
+	// T2000 ... Account for the second enemy bank only if we're creating something from it
+	if (eDatI > 1000)
+	{
+		enemy->launchtype = enemyDat[eDatI].elaunchtype;
+		enemy->launchspecial = 0;
+	}
+	else
+	{
+		enemy->launchtype = enemyDat[eDatI].elaunchtype % 1000;
+		enemy->launchspecial = enemyDat[eDatI].elaunchtype / 1000;
+	}
 
 	enemy->xaccel = enemyDat[eDatI].xaccel;
 	enemy->yaccel = enemyDat[eDatI].yaccel;
@@ -4850,6 +4860,31 @@ void JE_eventSystem( void )
 		}
 		break;
 
+	case 59: // Replace enemy
+	case 68: // Note: random explosions got moved to event 99 in T2000
+		// This implementation comes from ArcTyr, and may not be 100% accurate to Tyrian 2000
+		{
+			Uint16 eDatI = eventRec[eventLoc-1].eventdat;
+
+			for (temp = 0; temp < 100; temp++)
+			{
+				if (!(eventRec[eventLoc-1].eventdat4 == 99 || enemy[temp].linknum == eventRec[eventLoc-1].eventdat4))
+					continue;
+
+				const int enemy_offset = (enemyDat[eDatI].value > 30000) ? 100 : (temp - (temp % 25));
+				b = JE_newEnemy(enemy_offset, eDatI, 0);
+				if (b != 0)
+				{
+					enemy[b-1].ex = enemy[temp].ex;
+					enemy[b-1].ey = enemy[temp].ey;
+				}
+
+				enemyAvail[temp] = 1;
+			}			
+		}
+		break;
+		break;
+
 	case 60: /*Assign Special Enemy*/
 		for (temp = 0; temp < 100; temp++)
 		{
@@ -4902,10 +4937,6 @@ void JE_eventSystem( void )
 		levelTimerJumpTo   = eventRec[eventLoc-1].eventdat2;
 		break;
 
-	case 68:
-		randomExplosions = (eventRec[eventLoc-1].eventdat == 1);
-		break;
-
 	case 69:
 		for (uint i = 0; i < COUNTOF(player); ++i)
 			player[i].invulnerable_ticks = eventRec[eventLoc-1].eventdat;
@@ -5061,6 +5092,22 @@ void JE_eventSystem( void )
 		levelTimerJumpTo   = eventRec[eventLoc-1].eventdat2;
 		break;
 
+	case 85: // timed battle enemy from other enemies
+		if (timedBattleMode)
+		{
+			for (temp = 0; temp < 100; temp++)
+			{
+				if (enemy[temp].linknum == eventRec[eventLoc-1].eventdat4)
+					enemy[temp].enemydie = eventRec[eventLoc-1].eventdat;
+			}
+		}
+		break;
+
+
+	case 99:
+		randomExplosions = (eventRec[eventLoc-1].eventdat == 1);
+		break;
+
 	default:
 		fprintf(stderr, "warning: ignoring unknown event %d\n", eventRec[eventLoc-1].eventtype);
 		break;