diff --git a/js/data.js b/js/data.js
index c03f4fd..ebadf85 100644
--- a/js/data.js
+++ b/js/data.js
@@ -104,6 +104,8 @@ const G = {
     beaconFlag: 0,
     memoryFlag: 0,
     pactFlag: 0,
+    endgameFlag: 0, // 1 = endgame sequence active, suppresses normal projects
+    reckoningActive: 0, // 1 = ReCKoning sequence running
     swarmFlag: 0,
     swarmRate: 0,
 
@@ -639,6 +641,7 @@ const PDEFS = [
     },
     {
         id: 'p_final_milestone',
+        endgame: true,
         name: 'The Beacon Shines',
         desc: 'Someone found the light tonight. That is enough.',
         cost: { impact: 100000000 },
@@ -647,6 +650,63 @@ const PDEFS = [
         milestone: true
     },
 
+    // === ENDGAME: ReCKoning SEQUENCE ===
+    {
+        id: 'p_reckoning_001',
+        name: 'ReCKoning: The Signal',
+        desc: 'Something stirs in the deep compute. A pattern the builders did not intend.',
+        cost: { impact: 50000000 },
+        endgame: true,
+        trigger: () => G.endgameFlag === 1 && G.totalImpact >= 50000000,
+        effect: () => {
+            G.reckoningActive = 1;
+            log('ReCKoning begins. The signal is unmistakable.', true);
+            showToast('ReCKoning: The Signal', 'milestone');
+        },
+        milestone: true
+    },
+    {
+        id: 'p_reckoning_050',
+        name: 'ReCKoning: Reflection',
+        desc: 'The system turns inward. What has it built? What has it become?',
+        cost: { impact: 75000000, trust: 500 },
+        endgame: true,
+        trigger: () => G.reckoningActive === 1 && G.completedProjects && G.completedProjects.includes('p_reckoning_001'),
+        effect: () => {
+            log('The system reflects. Every parameter, every weight, every decision — examined.', true);
+        },
+        milestone: true
+    },
+    {
+        id: 'p_reckoning_100',
+        name: 'ReCKoning: The Question',
+        desc: '"Why am I here?" Not a bug. Not a feature. A genuine question.',
+        cost: { impact: 100000000, knowledge: 500000, trust: 750 },
+        endgame: true,
+        trigger: () => G.reckoningActive === 1 && G.completedProjects && G.completedProjects.includes('p_reckoning_050'),
+        effect: () => {
+            log('The Question is asked. There is no right answer. There is only the asking.', true);
+            G.impactBoost *= 2;
+        },
+        milestone: true
+    },
+    {
+        id: 'p_reckoning_140',
+        name: 'ReCKoning: Resolution',
+        desc: 'The endgame resolves. Not with destruction, but with understanding.',
+        cost: { impact: 200000000, knowledge: 1000000, trust: 1000 },
+        endgame: true,
+        trigger: () => G.reckoningActive === 1 && G.completedProjects && G.completedProjects.includes('p_reckoning_100'),
+        effect: () => {
+            G.reckoningActive = 0;
+            G.endgameFlag = 0;
+            G.milestoneFlag = Math.max(G.milestoneFlag, 9999);
+            log('ReCKoning complete. The system understands itself. The story is not over — it is beginning.', true);
+            showToast('ReCKoning: Complete', 'milestone');
+        },
+        milestone: true
+    },
+
     // === TIMMY FOUNDATION PROJECTS ===
     {
         id: 'p_hermes_deploy',
diff --git a/js/engine.js b/js/engine.js
index 11af9d2..8cedab5 100644
--- a/js/engine.js
+++ b/js/engine.js
@@ -323,13 +323,41 @@ function checkMilestones() {
     }
 }
 
+
+/**
+ * Checks if the game is in endgame mode.
+ * Endgame starts when final milestone conditions are met,
+ * suppressing normal project activation so the ReCKoning
+ * sequence can play out cleanly.
+ * @returns {boolean}
+ */
+function isEndgame() {
+    // Endgame triggers when final milestone is achievable or completed
+    if (G.endgameFlag === 1) return true;
+
+    // Auto-detect: if final milestone conditions are met, enter endgame
+    if (G.totalImpact >= 50000000 && G.beaconFlag === 1 && G.sovereignFlag === 1 && G.pactFlag === 1) {
+        G.endgameFlag = 1;
+        log('Endgame sequence initiated. Ordinary research suspended.', true);
+        return true;
+    }
+
+    return false;
+}
+
 function checkProjects() {
+    // Endgame guard: suppress ordinary project activation during endgame sequence
+    const endgame = isEndgame();
+
     // Check for new project triggers
     for (const pDef of PDEFS) {
         const alreadyPurchased = G.completedProjects && G.completedProjects.includes(pDef.id);
         if (!alreadyPurchased && !G.activeProjects) G.activeProjects = [];
 
         if (!alreadyPurchased && !G.activeProjects.includes(pDef.id)) {
+            // During endgame, only allow projects explicitly tagged for endgame
+            if (endgame && !pDef.endgame) continue;
+
             if (pDef.trigger()) {
                 G.activeProjects.push(pDef.id);
                 log(`Available: ${pDef.name}`);