diff --git a/src/services/worldStateService.ts b/src/services/worldStateService.ts
index cb592ba8..374a946d 100644
--- a/src/services/worldStateService.ts
+++ b/src/services/worldStateService.ts
@@ -252,10 +252,12 @@ export const getSortie = (day: number): ISortie => {
 
     const selectedNodes: ISortieMission[] = [];
     const missionTypes = new Set();
+    const modifierTypes = new Set();
 
     for (let i = 0; i < 3; i++) {
         const randomIndex = rng.randomInt(0, nodes.length - 1);
         const node = nodes[randomIndex];
+        let modifierType: string;
 
         const modifiers = [
             "SORTIE_MODIFIER_LOW_ENERGY",
@@ -283,7 +285,9 @@ export const getSortie = (day: number): ISortie => {
             const tileset = sortieTilesets[sortieBossNode[boss] as keyof typeof sortieTilesets] as TSortieTileset;
             pushTilesetModifiers(modifiers, tileset);
 
-            const modifierType = rng.randomElement(modifiers)!;
+            do {
+                modifierType = rng.randomElement(modifiers)!;
+            } while (modifierTypes.has(modifierType));
 
             selectedNodes.push({
                 missionType: "MT_ASSASSINATION",
@@ -318,7 +322,9 @@ export const getSortie = (day: number): ISortie => {
             modifiers.push("SORTIE_MODIFIER_SHIELDS");
         }
 
-        const modifierType = rng.randomElement(modifiers)!;
+        do {
+            modifierType = rng.randomElement(modifiers)!;
+        } while (modifierTypes.has(modifierType));
 
         selectedNodes.push({
             missionType,
@@ -328,6 +334,7 @@ export const getSortie = (day: number): ISortie => {
         });
         nodes.splice(randomIndex, 1);
         missionTypes.add(missionType);
+        modifierTypes.add(modifierType);
     }
 
     const dayStart = getSortieTime(day);