diff --git a/app/game/[id]/game-page-client.tsx b/app/game/[id]/game-page-client.tsx
index a6558f3..1f08d4d 100644
--- a/app/game/[id]/game-page-client.tsx
+++ b/app/game/[id]/game-page-client.tsx
@@ -15,6 +15,7 @@ import {
     Plus,
     ThumbsUpIcon,
     ThumbsDownIcon,
+    GaugeIcon,
 } from "lucide-react"
 import Link from "next/link"
 import { useSession } from "@/lib/auth-client"
@@ -81,6 +82,7 @@ interface Preset {
     fpsAvg: number | null
     fpsLow: number | null
     fpsHigh: number | null
+    fpsOnePercentLow: number | null
     upscalerType: string | null
     upscalerVersion: string | null
     frameGenMethod: string | null
@@ -102,6 +104,8 @@ interface StatsResponse {
         bestDevice: string
         verifiedCount: number
         versionCount: number
+        avgStability: number | null
+        bestOnePercentLow: number | null
     }
     isRawPerformer: boolean
     isPoorPerformance: boolean
@@ -111,6 +115,7 @@ interface StatsResponse {
         min: number
         q1: number
         median: number
+        onePercentLow?: number
         q3: number
         max: number
     }>
@@ -136,6 +141,7 @@ interface StatsResponse {
         fpsLow: number
         fpsAvg: number
         fpsHigh: number
+        fpsOnePercentLow: number | null
         isRawPerformer: boolean
     }>
     deviceBreakdown: Array<{
@@ -840,11 +846,16 @@ export function GamePageClient({
                                                             {" "}
                                                             avg
                                                         </span>
-                                                        {preset.fpsLow !== null && (
+                                                        {preset.fpsOnePercentLow !== null && (
                                                             <span className='text-text/40'>
                                                                 {" "}
-                                                                ({preset.fpsLow}–
-                                                                {preset.fpsHigh})
+                                                                · {preset.fpsOnePercentLow} 1% low
+                                                            </span>
+                                                        )}
+                                                        {preset.fpsLow !== null && preset.fpsHigh !== null && !preset.fpsOnePercentLow && (
+                                                            <span className='text-text/40'>
+                                                                {" "}
+                                                                ({preset.fpsLow}–{preset.fpsHigh})
                                                             </span>
                                                         )}
                                                     </div>
@@ -953,6 +964,13 @@ export function GamePageClient({
                                     )}
                                     icon={DatabaseIcon}
                                 />
+                                {filteredStats.summary.avgStability !== null && (
+                                    <StatCard
+                                        label='Avg Stability'
+                                        value={`${Math.round(filteredStats.summary.avgStability * 100)}%`}
+                                        icon={GaugeIcon}
+                                    />
+                                )}
                             </div>
                         </div>
                     )}
diff --git a/app/game/[id]/page.tsx b/app/game/[id]/page.tsx
index 429ae05..4c957c7 100644
--- a/app/game/[id]/page.tsx
+++ b/app/game/[id]/page.tsx
@@ -219,6 +219,7 @@ export default async function GamePage({
                 fpsAvg: performanceEntries.fpsAvg,
                 fpsLow: performanceEntries.fpsLow,
                 fpsHigh: performanceEntries.fpsHigh,
+                fpsOnePercentLow: performanceEntries.fpsOnePercentLow,
                 upscalerType: performanceEntries.upscalerType,
                 upscalerVersion: performanceEntries.upscalerVersion,
                 frameGenMethod: performanceEntries.frameGenMethod,
@@ -292,6 +293,7 @@ export default async function GamePage({
         fpsAvg: p.fpsAvg,
         fpsLow: p.fpsLow,
         fpsHigh: p.fpsHigh,
+        fpsOnePercentLow: p.fpsOnePercentLow ?? null,
         upscalerType: p.upscalerType,
         upscalerVersion: p.upscalerVersion,
         frameGenMethod: p.frameGenMethod,
diff --git a/app/game/[id]/preset-detail-modal.tsx b/app/game/[id]/preset-detail-modal.tsx
index de50faf..5209d4a 100644
--- a/app/game/[id]/preset-detail-modal.tsx
+++ b/app/game/[id]/preset-detail-modal.tsx
@@ -33,6 +33,7 @@ interface Preset {
     fpsAvg: number | null
     fpsLow: number | null
     fpsHigh: number | null
+    fpsOnePercentLow: number | null
     upscalerType: string | null
     upscalerVersion: string | null
     frameGenMethod: string | null
@@ -295,6 +296,14 @@ export function PresetDetailModal({
                                         </div>
                                     </div>
                                 )}
+                                {preset.fpsOnePercentLow !== null && (
+                                    <div className="flex flex-col gap-1">
+                                        <span className="text-[10px] text-text/50 uppercase tracking-wider">1% Low FPS</span>
+                                        <span className="text-sm font-semibold tabular-nums text-text">
+                                            {preset.fpsOnePercentLow} fps
+                                        </span>
+                                    </div>
+                                )}
 
                                 <div className="h-px bg-border" />
 
diff --git a/lib/api/game-stats.ts b/lib/api/game-stats.ts
index 82e154b..3c6a0c6 100644
--- a/lib/api/game-stats.ts
+++ b/lib/api/game-stats.ts
@@ -34,6 +34,7 @@ export const gameStatsRoutes = new Elysia({ prefix: "/games" }).get(
         fpsAvg: performanceEntries.fpsAvg,
         fpsLow: performanceEntries.fpsLow,
         fpsHigh: performanceEntries.fpsHigh,
+        fpsOnePercentLow: performanceEntries.fpsOnePercentLow,
         upscalerType: performanceEntries.upscalerType,
         upscalerVersion: performanceEntries.upscalerVersion,
         frameGenMethod: performanceEntries.frameGenMethod,
@@ -140,12 +141,14 @@ export const gameStatsRoutes = new Elysia({ prefix: "/games" }).get(
         const q1Idx = Math.floor(n * 0.25)
         const medIdx = Math.floor(n * 0.5)
         const q3Idx = Math.floor(n * 0.75)
+        const onePercentLow = sorted.length > 0 ? sorted[Math.max(0, Math.floor(sorted.length * 0.01))] : sorted[0]
         return {
           hardwareSlug: slug,
           hardwareName,
           min: sorted[0],
           q1: sorted[q1Idx],
           median: sorted[medIdx],
+          onePercentLow,
           q3: sorted[q3Idx],
           max: sorted[n - 1],
         }
@@ -222,6 +225,7 @@ export const gameStatsRoutes = new Elysia({ prefix: "/games" }).get(
         fpsLow: e.fpsLow!,
         fpsAvg: e.fpsAvg ?? 0,
         fpsHigh: e.fpsHigh!,
+        fpsOnePercentLow: e.fpsOnePercentLow ?? null,
         isRawPerformer:
           (e.fpsAvg ?? 0) >= 60 &&
           e.upscalerType === "none" &&
@@ -229,6 +233,16 @@ export const gameStatsRoutes = new Elysia({ prefix: "/games" }).get(
         isPoorPerformer: (e.fpsAvg ?? 0) < 30,
       }))
 
+    // Stability score computation
+    const stabilityScores = entries
+      .filter(e => e.fpsOnePercentLow != null && (e.fpsAvg ?? 0) > 0)
+      .map(e => Math.min(1, e.fpsOnePercentLow! / (e.fpsAvg ?? 1)))
+    const avgStability = stabilityScores.length > 0
+      ? Math.round((stabilityScores.reduce((a, b) => a + b, 0) / stabilityScores.length) * 100) / 100
+      : null
+    const bestOnePercentLow = entries.reduce((best, e) =>
+      e.fpsOnePercentLow != null && e.fpsOnePercentLow > (best ?? 0) ? e.fpsOnePercentLow : best, null as number | null)
+
     // ── 8. Device breakdown ───────────────────────────────────────
     const deviceBreakdown = Array.from(boxplotMap.entries()).map(
       ([slug, { hardwareName, values }]) => ({
@@ -253,6 +267,8 @@ export const gameStatsRoutes = new Elysia({ prefix: "/games" }).get(
         bestDevice,
         verifiedCount,
         versionCount,
+        avgStability,
+        bestOnePercentLow,
       },
       isRawPerformer,
       isPoorPerformance,