diff --git a/gamedir/Data-1.13/TableData/Backgrounds.xml b/gamedir/Data-1.13/TableData/Backgrounds.xml
index e33f217ed..999db9148 100644
--- a/gamedir/Data-1.13/TableData/Backgrounds.xml
+++ b/gamedir/Data-1.13/TableData/Backgrounds.xml
@@ -91,6 +91,7 @@
 															   2: anti-smoker: refuses to smoke, dislikes smokers-->
 		<croucheddefense>0</croucheddefense>			  <!-- +- enemy cth if we are crouched against thick cover in their direction, -30 to 30-->
 		<fortify_assignment>0</fortify_assignment>		  <!-- +- % building speed, -50 to 200 -->
+		<snake_defense>0</snake_defense>				  <!-- +- % chance to evade snake attacks, -100 to 100 -->
 
 		<dislikebackground>0</dislikebackground>          <!-- dislike everybody with a background that has the negative of this value -->
 
@@ -3987,25 +3988,16 @@
 		<szName>Metaviran Native</szName>
 		<szShortName>Metavira</szShortName>
 		<szDescription>The indigenous people of Metavira have adjusted to the hostile &#10;jungle there. After the liberation, some joined the foreigners, and sought their luck elsewhere.</szDescription>
-		<ap_polar>-5</ap_polar>
-		<ap_desert>-3</ap_desert>
 		<ap_urban>-3</ap_urban>
-		<ap_river>3</ap_river>
-		<ap_coastal>3</ap_coastal>
 		<ap_swamp>3</ap_swamp>
 		<ap_tropical>3</ap_tropical>
 		<ap_swimming>-10</ap_swimming>
-		<travel_boat>5</travel_boat>
-		<speed_run>10</speed_run>
-		<meleedamage>7</meleedamage>
 		<cth_blades>7</cth_blades>
 		<stealth>5</stealth>
 		<resistance_disease>20</resistance_disease>
-		<resistance_physical>3</resistance_physical>
-		<resistance_fear>3</resistance_fear>
-		<drink_energyregen>25</drink_energyregen>
 		<camo>5</camo>
 		<ambush_radius>20</ambush_radius>
+		<snake_defense>60</snake_defense>
 		<no_male>1</no_male>
 		<no_female>1</no_female>
 	</BACKGROUND>
diff --git a/gamedir/Data-1.13/TableData/Map/SectorNames.xml b/gamedir/Data-1.13/TableData/Map/SectorNames.xml
index 340e3f919..36f5d7769 100644
--- a/gamedir/Data-1.13/TableData/Map/SectorNames.xml
+++ b/gamedir/Data-1.13/TableData/Map/SectorNames.xml
@@ -49,6 +49,9 @@
 	<snakechance>
 	Value between 0 and 100. If > 0, snakes can attack people in water. The higher the value, the more frequent this happens.
 	
+	<numsnakes>
+	Value between 0 and 100. This is the maximum number of snakes that can be active during a snake attack.
+	
 	<maxworkers>
 	Maximum number of workers that can be employed in this sector.
 -->
@@ -66,6 +69,7 @@
 	<sandstormchance>0</sandstormchance>
 	<snowchance>0</snowchance>
 	<snakechance>0</snakechance>
+	<numsnakes>0</numsnakes>
   </SECTOR>
   <SECTOR>
     <SectorGrid>A2</SectorGrid>
@@ -417,6 +421,7 @@
 	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
   <SECTOR>
     <SectorGrid>B16</SectorGrid>
@@ -597,6 +602,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>	
    <SECTOR>
     <SectorGrid>C16</SectorGrid>
@@ -609,6 +615,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>D1</SectorGrid>
@@ -749,6 +756,7 @@
  	<rainchance>60</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>D13</SectorGrid>
@@ -911,6 +919,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>E11</SectorGrid>
@@ -956,6 +965,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR> 
    <SECTOR>
     <SectorGrid>E15</SectorGrid>
@@ -1350,6 +1360,7 @@
  	<rainchance>60</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>H1</SectorGrid>
@@ -1533,6 +1544,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>H16</SectorGrid>
@@ -1786,6 +1798,7 @@
  	<rainchance>75</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>J5</SectorGrid>
@@ -1798,6 +1811,7 @@
  	<rainchance>75</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>J6</SectorGrid>
@@ -1973,6 +1987,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>K4</SectorGrid>
@@ -1986,6 +2001,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>K5</SectorGrid>
@@ -1998,6 +2014,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>K6</SectorGrid>
@@ -2153,6 +2170,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>L4</SectorGrid>
@@ -2165,6 +2183,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>L5</SectorGrid>
@@ -2279,6 +2298,7 @@
  	<rainchance>80</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>L15</SectorGrid>
@@ -2337,6 +2357,7 @@
  	<rainchance>90</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>M4</SectorGrid>
@@ -2463,6 +2484,7 @@
  	<rainchance>70</rainchance>
 	<sandstormchance>0</sandstormchance>
 	<snakechance>50</snakechance>
+	<numsnakes>7</numsnakes>
   </SECTOR>
    <SECTOR>
     <SectorGrid>M15</SectorGrid>