diff --git a/README.md b/README.md
index d08107867..7095a36cf 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Check out our [Trello Board](https://trello.com/b/z10B703R/pokerogue-board) to s
     - Arata Iiyoshi
     - Atsuhiro Ishizuna
   - Pokémon Black/White 2
+  - Firel (Additional biome themes)
   - edifette (Title screen music)
 
 ### 🎵 Sound Effects
diff --git a/public/audio/bgm/laboratory.mp3 b/public/audio/bgm/laboratory.mp3
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diff --git a/public/audio/bgm/metropolis.mp3 b/public/audio/bgm/metropolis.mp3
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diff --git a/public/images/arenas/island_a.png b/public/images/arenas/island_a.png
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diff --git a/public/images/arenas/jungle_a.png b/public/images/arenas/jungle_a.png
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diff --git a/public/images/arenas/snowy_forest_a.png b/public/images/arenas/snowy_forest_a.png
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new file mode 100644
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diff --git a/public/images/arenas/snowy_forest_b_3.png b/public/images/arenas/snowy_forest_b_3.png
new file mode 100644
index 000000000..521870232
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diff --git a/public/images/arenas/snowy_forest_bg.png b/public/images/arenas/snowy_forest_bg.png
index bfe7545c9..c449ddb32 100644
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diff --git a/src/field/arena.ts b/src/field/arena.ts
index 5101ffd29..46b16eed8 100644
--- a/src/field/arena.ts
+++ b/src/field/arena.ts
@@ -582,7 +582,7 @@ export class Arena {
       case Biome.TALL_GRASS:
         return 9.608;
       case Biome.METROPOLIS:
-        return 4.867;
+        return 141.470;
       case Biome.FOREST:
         return 4.294;
       case Biome.SEA:
@@ -636,7 +636,7 @@ export class Arena {
       case Biome.ISLAND:
         return 2.751;
       case Biome.LABORATORY:
-        return 0.797;
+        return 114.862;
       case Biome.SLUM:
         return 1.221;
       case Biome.SNOWY_FOREST:
@@ -646,19 +646,12 @@ export class Arena {
 }
 
 export function getBiomeKey(biome: Biome): string {
-  switch (biome) {
-    case Biome.METROPOLIS:
-      return 'slum';
-    case Biome.JUNGLE:
-      return 'tall_grass';
-    case Biome.ISLAND:
-      return 'beach';
-  }
   return Biome[biome].toLowerCase();
 }
 
 export function getBiomeHasProps(biomeType: Biome): boolean {
   switch (biomeType) {
+    case Biome.METROPOLIS:
     case Biome.BEACH:
     case Biome.LAKE:
     case Biome.SEABED:
@@ -676,8 +669,11 @@ export function getBiomeHasProps(biomeType: Biome): boolean {
     case Biome.WASTELAND:
     case Biome.ABYSS:
     case Biome.CONSTRUCTION_SITE:
+    case Biome.JUNGLE:
     case Biome.FAIRY_CAVE:
     case Biome.TEMPLE:
+    case Biome.SNOWY_FOREST:
+    case Biome.ISLAND:
     case Biome.LABORATORY:
     case Biome.END:
       return true;