diff --git a/src/battle/hud.c b/src/battle/hud.c
index 006d720..773d0e4 100644
--- a/src/battle/hud.c
+++ b/src/battle/hud.c
@@ -458,6 +458,10 @@ static void drawObjectives(void)
 		{
 			drawText(SCREEN_WIDTH / 2, 35, 14, TA_CENTER, colors.white, "%d / %d", battle.stats[STAT_CIVILIANS_RESCUED], game.currentMission->challengeData.rescueLimit);
 		}
+		else if (player->flags & EF_MUST_DISABLE)
+		{
+			drawText(SCREEN_WIDTH / 2, 35, 14, TA_CENTER, colors.white, _("System Power : %d%%"), player->systemPower);
+		}
 	}
 }
 
diff --git a/src/battle/player.c b/src/battle/player.c
index 9918fa0..457b4ea 100644
--- a/src/battle/player.c
+++ b/src/battle/player.c
@@ -142,6 +142,16 @@ void doPlayer(void)
 				initPlayerSelect();
 			}
 		}
+		
+		/* really only used in challenge mode */
+		if (player->systemPower <= 0 && battle.status == MS_IN_PROGRESS)
+		{
+			if (game.currentMission->challengeData.isChallenge)
+			{
+				addHudMessage(colors.red, _("Challenge Failed!"));
+				failMission();
+			}
+		}
 
 		if (battle.status == MS_IN_PROGRESS)
 		{