diff --git a/src/client/graphics/GameRenderer.ts b/src/client/graphics/GameRenderer.ts
index 58b298c13..e2b0e15f9 100644
--- a/src/client/graphics/GameRenderer.ts
+++ b/src/client/graphics/GameRenderer.ts
@@ -15,6 +15,7 @@ import { EventsDisplay } from "./layers/EventsDisplay";
 import { FxLayer } from "./layers/FxLayer";
 import { Layer } from "./layers/Layer";
 import { Leaderboard } from "./layers/Leaderboard";
+import { LeftInGameAd } from "./layers/LeftInGameAd";
 import { MultiTabModal } from "./layers/MultiTabModal";
 import { NameLayer } from "./layers/NameLayer";
 import { OptionsMenu } from "./layers/OptionsMenu";
@@ -171,6 +172,14 @@ export function createRenderer(
   }
   playerTeamLabel.game = game;
 
+  const leftInGameAd = document.querySelector(
+    "left-in-game-ad",
+  ) as LeftInGameAd;
+  if (!(leftInGameAd instanceof LeftInGameAd)) {
+    console.error("left in game ad not found");
+  }
+  leftInGameAd.g = game;
+
   const layers: Layer[] = [
     new TerrainLayer(game, transformHandler),
     new TerritoryLayer(game, eventBus),
@@ -204,6 +213,7 @@ export function createRenderer(
     playerPanel,
     playerTeamLabel,
     multiTabModal,
+    leftInGameAd,
   ];
 
   return new GameRenderer(
diff --git a/src/client/graphics/layers/LeftInGameAd.ts b/src/client/graphics/layers/LeftInGameAd.ts
new file mode 100644
index 000000000..602fcb0dd
--- /dev/null
+++ b/src/client/graphics/layers/LeftInGameAd.ts
@@ -0,0 +1,111 @@
+import { LitElement, css, html } from "lit";
+import { customElement, state } from "lit/decorators.js";
+import { GameView } from "../../../core/game/GameView";
+import { Layer } from "./Layer";
+
+declare global {
+  interface Window {
+    aiptag: {
+      cmd: {
+        display: {
+          push: (callback: () => void) => void;
+        };
+      };
+    };
+    aipDisplayTag: {
+      display: (id: string) => void;
+    };
+  }
+}
+
+const BREAKPOINT = {
+  width: 1000,
+  height: 800,
+};
+
+const AD_SIZE = "openfront-io_300x250_ingame";
+
+@customElement("left-in-game-ad")
+export class LeftInGameAd extends LitElement implements Layer {
+  public g: GameView;
+
+  @state()
+  private isVisible: boolean = false;
+
+  // Override createRenderRoot to disable shadow DOM
+  createRenderRoot() {
+    return this;
+  }
+
+  static styles = css`
+    .ad-container {
+      position: fixed;
+      left: 0;
+      top: 50%;
+      transform: translateY(-50%);
+      z-index: 9000;
+      pointer-events: auto;
+    }
+  `;
+
+  constructor() {
+    super();
+  }
+
+  public show(): void {
+    this.isVisible = true;
+    this.requestUpdate();
+    // Refresh the ad when showing
+    setTimeout(() => this.refreshAd(), 100);
+  }
+
+  public hide(): void {
+    this.isVisible = false;
+    this.requestUpdate();
+  }
+
+  public async tick() {
+    if (!this.isVisible && !this.g.inSpawnPhase() && this.screenLargeEnough()) {
+      console.log("showing left in game ad");
+      this.show();
+    }
+    if (this.isVisible && !this.screenLargeEnough()) {
+      console.log("hiding left in game ad");
+      this.hide();
+    }
+  }
+
+  private screenLargeEnough(): boolean {
+    return (
+      window.innerWidth > BREAKPOINT.width &&
+      window.innerHeight > BREAKPOINT.height
+    );
+  }
+
+  private refreshAd(): void {
+    if (window.aiptag && window.aiptag.cmd && window.aiptag.cmd.display) {
+      window.aiptag.cmd.display.push(
+        function () {
+          if (window.aipDisplayTag) {
+            window.aipDisplayTag.display(AD_SIZE);
+          }
+        }.bind(this),
+      );
+    }
+  }
+
+  render() {
+    if (!this.isVisible) {
+      return html``;
+    }
+
+    return html`
+      <div
+        class="ad-container"
+        style="position: fixed; left: 0; top: 50%; transform: translateY(-50%); z-index: 9999;"
+      >
+        <div id="${AD_SIZE}"></div>
+      </div>
+    `;
+  }
+}
diff --git a/src/client/index.html b/src/client/index.html
index 6869f4f62..f308853e6 100644
--- a/src/client/index.html
+++ b/src/client/index.html
@@ -421,6 +421,7 @@
     <user-setting></user-setting>
     <multi-tab-modal></multi-tab-modal>
     <news-modal></news-modal>
+    <left-in-game-ad></left-in-game-ad>
     <div
       id="language-modal"
       class="fixed inset-0 bg-black bg-opacity-50 z-50 hidden flex justify-center items-center"