diff --git a/public/app.js b/public/app.js
index 2c2bf20..c5ea535 100644
--- a/public/app.js
+++ b/public/app.js
@@ -27,7 +27,8 @@ function connectWS() {
       renderRootme(msg.ranking);
     } else if (msg.type === 'rootme_flag') {
       renderRootme(rootmeCache);
-      showNotif(`FLAG ! ${msg.login} +${msg.gained} PTS — TOTAL : ${msg.newScore} PTS`);
+      showNotif(`FLAG ! ${msg.login} +${msg.gained} PTS — TOTAL : ${msg.newScore} PTS`, null);
+      playKillstreak(msg.streak || 1);
     } else if (msg.type === 'geo_news') {
       showGeoBanner(msg.title, msg.link);
     } else if (msg.type === 'anssi_news') {
@@ -65,6 +66,24 @@ const alertIconEl = document.getElementById('alert-icon');
 const alertImageEl = document.getElementById('alert-image');
 const infoAlert = document.getElementById('info-alert');
 
+// ── Killstreak sounds ─────────────────────────────────────────────────────────
+
+const killstreakSounds = [
+  null, // index 0 inutilisé
+  [new Audio('/sound_effects/first-blood-1.mp3'), new Audio('/sound_effects/first-blood-2.mp3')],
+  [new Audio('/sound_effects/double-kill-1.mp3'), new Audio('/sound_effects/double-kill-2.mp3')],
+  [new Audio('/sound_effects/triple-kill-1.mp3'), new Audio('/sound_effects/triple-kill-2.mp3')],
+  [new Audio('/sound_effects/monsterkill.mp3')],
+];
+const godlikeAudio = new Audio('/sound_effects/godlike.mp3');
+
+function playKillstreak(streak) {
+  const pool = streak >= 5 ? [godlikeAudio] : (killstreakSounds[streak] || killstreakSounds[1]);
+  const snd = pool[Math.floor(Math.random() * pool.length)];
+  snd.currentTime = 0;
+  snd.play().catch(err => console.error('killstreak audio:', err));
+}
+
 // ── Notification (ANSSI / geo) ────────────────────────────────────────────────
 
 const notifOverlay  = document.getElementById('notif-overlay');
diff --git a/server.js b/server.js
index 715dc10..2a8262d 100644
--- a/server.js
+++ b/server.js
@@ -13,6 +13,7 @@ const PORT = process.env.DASHBOARD_PORT || 3000;
 const app = express();
 app.use(express.json({ limit: '10mb' }));
 app.use(express.static(path.join(__dirname, 'public')));
+app.use('/sound_effects', express.static(path.resolve('sound_effects')));
 
 const server = http.createServer(app);
 const wss = new WebSocket.Server({ server });
@@ -263,6 +264,20 @@ let rootmeCache = null;
 let rootmePrevScores = {}; // login → last known score
 const rootmePlayerCache = {}; // id → { login, score, rank }
 
+// Killstreak : streak par joueur, réinitialisée quand un autre joueur flag
+let killstreakLastFlagger = null;
+const killstreakCounts = {}; // login → streak actuel
+
+function recordFlag(login) {
+  if (killstreakLastFlagger !== login) {
+    killstreakCounts[login] = 1;
+  } else {
+    killstreakCounts[login] = (killstreakCounts[login] || 0) + 1;
+  }
+  killstreakLastFlagger = login;
+  return killstreakCounts[login];
+}
+
 function parseRootmeUser(profile, id) {
   const profileRaw = Array.isArray(profile) ? profile[0] : profile;
   const user = profileRaw?.['0'] ?? profileRaw;
@@ -305,8 +320,9 @@ function startRootmePoller() {
           const prev = rootmePrevScores[entry.login];
           if (prev !== undefined && entry.score > prev) {
             const gained = entry.score - prev;
-            console.log(`[rootme] FLAG ! ${entry.login} +${gained} pts (${prev} → ${entry.score})`);
-            broadcast({ type: 'rootme_flag', login: entry.login, gained, newScore: entry.score });
+            const streak = recordFlag(entry.login);
+            console.log(`[rootme] FLAG ! ${entry.login} +${gained} pts (${prev} → ${entry.score}) streak=${streak}`);
+            broadcast({ type: 'rootme_flag', login: entry.login, gained, newScore: entry.score, streak });
           }
           rootmePrevScores[entry.login] = entry.score;
 
diff --git a/sound_effects/double-kill-1.mp3 b/sound_effects/double-kill-1.mp3
new file mode 100644
index 0000000..ac4a97b
Binary files /dev/null and b/sound_effects/double-kill-1.mp3 differ
diff --git a/sound_effects/double-kill-2.mp3 b/sound_effects/double-kill-2.mp3
new file mode 100644
index 0000000..4fe8c42
Binary files /dev/null and b/sound_effects/double-kill-2.mp3 differ
diff --git a/sound_effects/first-blood-1.mp3 b/sound_effects/first-blood-1.mp3
new file mode 100644
index 0000000..c0e49be
Binary files /dev/null and b/sound_effects/first-blood-1.mp3 differ
diff --git a/sound_effects/first-blood-2.mp3 b/sound_effects/first-blood-2.mp3
new file mode 100644
index 0000000..1799a6c
Binary files /dev/null and b/sound_effects/first-blood-2.mp3 differ
diff --git a/sound_effects/godlike.mp3 b/sound_effects/godlike.mp3
new file mode 100644
index 0000000..ee9fcd7
Binary files /dev/null and b/sound_effects/godlike.mp3 differ
diff --git a/sound_effects/monsterkill.mp3 b/sound_effects/monsterkill.mp3
new file mode 100644
index 0000000..c11f1bf
Binary files /dev/null and b/sound_effects/monsterkill.mp3 differ
diff --git a/sound_effects/triple-kill-1.mp3 b/sound_effects/triple-kill-1.mp3
new file mode 100644
index 0000000..dac6607
Binary files /dev/null and b/sound_effects/triple-kill-1.mp3 differ
diff --git a/sound_effects/triple-kill-2.mp3 b/sound_effects/triple-kill-2.mp3
new file mode 100644
index 0000000..a23b61f
Binary files /dev/null and b/sound_effects/triple-kill-2.mp3 differ