diff --git a/src/components/frontend/minigames/eod/EodArena.tsx b/src/components/frontend/minigames/eod/EodArena.tsx
index 7010802..be1a74c 100644
--- a/src/components/frontend/minigames/eod/EodArena.tsx
+++ b/src/components/frontend/minigames/eod/EodArena.tsx
@@ -34,7 +34,6 @@ export function EodArena({
   const clearedSectors = [
     initialStats.bestTrainingTime,
     initialStats.bestPerimeterTime,
-    initialStats.bestSupplyRoadTime,
   ].filter((time) => time > 0).length;
 
   useEffect(() => {
@@ -55,8 +54,8 @@ export function EodArena({
       {!customUnlocked && (
         <UnlockNotice
           title="custom minefields"
-          requirement="you have cleared Training Pad, FOB Perimeter, and Main Supply Road"
-          progress={`${clearedSectors} of 3 sectors cleared`}
+          requirement="you have cleared Training Pad and FOB Perimeter"
+          progress={`${clearedSectors} of 2 sectors cleared`}
         />
       )}
       <MinesweeperBoard
diff --git a/src/components/frontend/minigames/eod/MinesweeperBoard.tsx b/src/components/frontend/minigames/eod/MinesweeperBoard.tsx
index 4ba6242..75161c7 100644
--- a/src/components/frontend/minigames/eod/MinesweeperBoard.tsx
+++ b/src/components/frontend/minigames/eod/MinesweeperBoard.tsx
@@ -20,6 +20,7 @@ import { PROFILE_UPDATE_EVENT } from "@/hooks/useGameTick";
 import { useSessionExpired } from "@/hooks/useSessionExpired";
 import { LoginLink } from "@/components/frontend/auth/LoginLink";
 import { cn } from "@/lib/utils";
+import { isEodUnlocked } from "@/lib/minigames/custom/eod";
 import { playClear, playExplosion, playFlag, playReveal, playXp } from "./sounds";
 
 type Phase = "ready" | "playing" | "over";
@@ -227,8 +228,11 @@ export function MinesweeperBoard({
   const longPressTimerRef = useRef<number | null>(null);
   const baseConfig: GameConfig = difficulty === "custom" ? customConfig : DIFFICULTIES[difficulty];
   const config = isMobile ? getMobileConfig(baseConfig, isLandscape) : baseConfig;
-  const customUnlocked =
-    stats.bestTrainingTime > 0 && stats.bestPerimeterTime > 0 && stats.bestSupplyRoadTime > 0;
+  const customUnlocked = isEodUnlocked({
+    bestTrainingTime: stats.bestTrainingTime,
+    bestPerimeterTime: stats.bestPerimeterTime,
+    bestSupplyRoadTime: stats.bestSupplyRoadTime,
+  });
   const isLargeCustomGame =
     difficulty === "custom" && config.rows * config.cols > CUSTOM_FULLSCREEN_CELL_THRESHOLD;
   const flaggedCount = board.reduce((count, cell) => count + (cell.flagged ? 1 : 0), 0);
@@ -812,7 +816,7 @@ export function MinesweeperBoard({
               </div>
           ) : !customUnlocked ? (
             <p className="text-xs text-muted-foreground">
-              Clear all three standard locations to unlock custom minefields.
+              Clear the Training Pad and FOB Perimeter to unlock custom minefields.
             </p>
           ) : null}
         </fieldset>
diff --git a/src/lib/minigames/custom/eod.ts b/src/lib/minigames/custom/eod.ts
index 7e515c9..659770a 100644
--- a/src/lib/minigames/custom/eod.ts
+++ b/src/lib/minigames/custom/eod.ts
@@ -23,13 +23,9 @@ export interface EodUnlockStats {
   bestSupplyRoadTime: number;
 }
 
-/** A player unlocks the custom minefield editor once they cleared all three standard difficulties. */
+/** A player unlocks the custom minefield editor once they cleared Training Pad and FOB Perimeter. */
 export function isEodUnlocked(stats: EodUnlockStats): boolean {
-  return (
-    stats.bestTrainingTime > 0 &&
-    stats.bestPerimeterTime > 0 &&
-    stats.bestSupplyRoadTime > 0
-  );
+  return stats.bestTrainingTime > 0 && stats.bestPerimeterTime > 0;
 }
 
 export function validateMinefieldName(name: unknown): { error?: string; name: string } {
diff --git a/tests/int/custom-minefields.int.spec.ts b/tests/int/custom-minefields.int.spec.ts
index 2dfec59..d1b903f 100644
--- a/tests/int/custom-minefields.int.spec.ts
+++ b/tests/int/custom-minefields.int.spec.ts
@@ -465,7 +465,7 @@ describe("Custom minefields", () => {
   // ---------------------------------------------------------------------------
 
   describe("Unlock gating", () => {
-    it("locks custom minefields until a win is recorded on all three difficulties", () => {
+    it("locks custom minefields until Training Pad and FOB Perimeter are cleared", () => {
       expect(
         isEodUnlocked({ bestTrainingTime: 0, bestPerimeterTime: 0, bestSupplyRoadTime: 0 }),
       ).toBe(false);
@@ -473,18 +473,24 @@ describe("Custom minefields", () => {
         isEodUnlocked({ bestTrainingTime: 45, bestPerimeterTime: 0, bestSupplyRoadTime: 0 }),
       ).toBe(false);
       expect(
-        isEodUnlocked({ bestTrainingTime: 45, bestPerimeterTime: 60, bestSupplyRoadTime: 0 }),
+        isEodUnlocked({ bestTrainingTime: 0, bestPerimeterTime: 60, bestSupplyRoadTime: 0 }),
       ).toBe(false);
     });
 
-    it("unlocks once every difficulty has a best time above zero", () => {
+    it("unlocks once Training Pad and FOB Perimeter have best times above zero", () => {
       expect(
-        isEodUnlocked({ bestTrainingTime: 1, bestPerimeterTime: 1, bestSupplyRoadTime: 1 }),
+        isEodUnlocked({ bestTrainingTime: 1, bestPerimeterTime: 1, bestSupplyRoadTime: 0 }),
       ).toBe(true);
       expect(
-        isEodUnlocked({ bestTrainingTime: 45, bestPerimeterTime: 60, bestSupplyRoadTime: 120 }),
+        isEodUnlocked({ bestTrainingTime: 45, bestPerimeterTime: 60, bestSupplyRoadTime: 0 }),
       ).toBe(true);
     });
+
+    it("does not let a Main Supply Road win substitute for the required sectors", () => {
+      expect(
+        isEodUnlocked({ bestTrainingTime: 0, bestPerimeterTime: 0, bestSupplyRoadTime: 120 }),
+      ).toBe(false);
+    });
   });
 
   // ---------------------------------------------------------------------------