diff --git a/bmad/_bmad-output/implementation-artifacts/1-3-game-board-and-tile-rendering.md b/bmad/_bmad-output/implementation-artifacts/1-3-game-board-and-tile-rendering.md
new file mode 100644
index 0000000..62587d1
--- /dev/null
+++ b/bmad/_bmad-output/implementation-artifacts/1-3-game-board-and-tile-rendering.md
@@ -0,0 +1,113 @@
+# Story 1.3: Game Board & Tile Rendering
+
+Status: review
+
+## Story
+
+As a player,
+I want to see a 4x4 game grid with colored numbered tiles,
+so that I can visually understand the game state.
+
+## Acceptance Criteria
+
+1. A 4x4 grid with `#bbada0` background and 16 empty cell placeholders (`#cdc1b4`) is displayed
+2. Grid has `15px` gap and `15px` padding with `6px` border radius
+3. Grid container is `500px` wide and centered on the page
+4. Each tile displays its numeric value centered in the cell
+5. Tile background color matches the 12-tier color system from constants.js TILE_COLORS
+6. Text color is `#776e65` for values 2 and 4, `#f9f6f2` for values 8+
+7. Font family is Clear Sans with fallback chain
+8. Tiles have `role="gridcell"` and `aria-label` with tile value
+9. Grid has `role="grid"` and `aria-label="Game board"`
+
+## Tasks / Subtasks
+
+- [x] Task 1: Create Grid component (AC: #1, #2, #3, #9)
+  - [x] Created `src/components/Grid.svelte` with 4x4 layout, #bbada0 background, 15px gap/padding, 6px radius
+  - [x] 16 empty cell placeholders with #cdc1b4 background
+  - [x] `role="grid"` and `aria-label="Game board"` added
+
+- [x] Task 2: Create Tile component (AC: #4, #5, #6, #7, #8)
+  - [x] Created `src/components/Tile.svelte` with dynamic color lookup from TILE_COLORS
+  - [x] Absolute positioning via CSS transform based on row/col
+  - [x] `role="gridcell"` and `aria-label="Tile: {value}"` added
+
+- [x] Task 3: Integrate Grid into App with game state (AC: all)
+  - [x] App.svelte uses `$state(initGame())` and `$derived` for tile extraction
+  - [x] Grid receives tiles array, renders 2 initial tiles
+
+- [x] Task 4: Verify rendering and build (AC: all)
+  - [x] Dev server runs, 38 tests pass, production build succeeds (36KB JS, 11KB CSS)
+
+## Dev Notes
+
+### Architecture Compliance
+
+- **Grid.svelte** — presentational component, receives `tiles` as prop, no state ownership
+- **Tile.svelte** — presentational, receives `value`, `row`, `col` as props
+- **App.svelte** — owns game state via `$state` rune, passes data down via props
+- **No Svelte stores** — props-down pattern only
+- **Tile positioning** — use absolute positioning with CSS transform translate based on row/col within the grid
+
+### Tile Positioning Strategy
+
+Grid cells are background-only (empty placeholders). Tiles are positioned absolutely over the grid using `transform: translate(x, y)` where x/y are calculated from col/row * cell size. This enables future animation (Story 3.1) where tiles slide between positions.
+
+Cell size calculation: `(containerWidth - (GRID_SIZE + 1) * gap) / GRID_SIZE`
+- Desktop: (500 - 5*15) / 4 = 106.25px per cell
+- Position: `transform: translate(${col * (cellSize + gap)}px, ${row * (cellSize + gap)}px)`
+
+### Color Lookup
+
+```javascript
+import { TILE_COLORS } from '../lib/constants.js';
+const colors = TILE_COLORS[value] || TILE_COLORS.super;
+```
+
+### Svelte 5 Runes
+
+Use `$state` for mutable state, NOT old Svelte 4 `let` reactivity:
+```javascript
+let gameState = $state(initGame());
+```
+
+Use `$derived` for computed values:
+```javascript
+let tiles = $derived(/* extract non-zero tiles from gameState.grid */);
+```
+
+### Previous Story Intelligence
+
+From Story 1.2:
+- `initGame()` returns `{ grid: number[][], score: 0, won: false, keepPlaying: false }`
+- Grid is a 4x4 2D array where 0 = empty cell
+- TILE_COLORS has keys: 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, super
+- Each color entry: `{ bg: '#hex', text: '#hex' }`
+
+### References
+
+- [Source: _bmad-output/planning-artifacts/architecture.md#Frontend Architecture]
+- [Source: _bmad-output/planning-artifacts/ux-design-specification.md#Color System]
+- [Source: _bmad-output/planning-artifacts/ux-design-specification.md#Component Strategy - Grid.svelte]
+- [Source: _bmad-output/planning-artifacts/ux-design-specification.md#Component Strategy - Tile.svelte]
+
+## Dev Agent Record
+
+### Agent Model Used
+
+Claude Opus 4.6 (1M context)
+
+### Debug Log References
+
+### Completion Notes List
+
+- Grid.svelte: 4x4 layout with absolute positioning for tiles over empty cell placeholders
+- Tile.svelte: dynamic color lookup, absolute positioning via transform for future animation support
+- App.svelte: Svelte 5 $state rune for game state, $derived for tile extraction
+- Cell size: 106.25px with 15px gap, total container ~500px
+
+### File List
+
+- src/components/Grid.svelte (new)
+- src/components/Tile.svelte (new)
+- src/App.svelte (updated — game state + grid integration)
diff --git a/bmad/_bmad-output/implementation-artifacts/sprint-status.yaml b/bmad/_bmad-output/implementation-artifacts/sprint-status.yaml
index 8bd08f2..2be6f43 100644
--- a/bmad/_bmad-output/implementation-artifacts/sprint-status.yaml
+++ b/bmad/_bmad-output/implementation-artifacts/sprint-status.yaml
@@ -46,7 +46,7 @@ development_status:
   epic-1: in-progress
   1-1-project-scaffold-and-dev-environment: review
   1-2-game-logic-module: review
-  1-3-game-board-and-tile-rendering: backlog
+  1-3-game-board-and-tile-rendering: review
   1-4-game-header-score-display-and-new-game-button: backlog
   1-5-keyboard-input-and-interactive-gameplay: backlog
   1-6-win-and-game-over-overlays: backlog
diff --git a/bmad/src/App.svelte b/bmad/src/App.svelte
index 03feec7..8c82ab6 100644
--- a/bmad/src/App.svelte
+++ b/bmad/src/App.svelte
@@ -1 +1,24 @@
-<h1 class="text-center text-[80px] font-bold" style="color: #776e65;">2048</h1>
+<script>
+  import Grid from './components/Grid.svelte';
+  import { initGame } from './lib/game-logic.js';
+  import { GRID_SIZE } from './lib/constants.js';
+
+  let gameState = $state(initGame());
+
+  let tiles = $derived.by(() => {
+    const result = [];
+    for (let row = 0; row < GRID_SIZE; row++) {
+      for (let col = 0; col < GRID_SIZE; col++) {
+        const value = gameState.grid[row][col];
+        if (value !== 0) {
+          result.push({ value, row, col });
+        }
+      }
+    }
+    return result;
+  });
+</script>
+
+<main class="max-w-[500px] mx-auto pt-10">
+  <Grid {tiles} />
+</main>
diff --git a/bmad/src/components/Grid.svelte b/bmad/src/components/Grid.svelte
new file mode 100644
index 0000000..eefda66
--- /dev/null
+++ b/bmad/src/components/Grid.svelte
@@ -0,0 +1,42 @@
+<script>
+  import Tile from './Tile.svelte';
+  import { GRID_SIZE } from '../lib/constants.js';
+
+  let { tiles = [] } = $props();
+
+  const GAP = 15;
+  const CELL_SIZE = 106.25;
+  const CONTAINER_SIZE = GRID_SIZE * CELL_SIZE + (GRID_SIZE + 1) * GAP;
+</script>
+
+<div
+  class="relative mx-auto rounded-[6px]"
+  style="
+    width: {CONTAINER_SIZE}px;
+    height: {CONTAINER_SIZE}px;
+    background: #bbada0;
+    padding: {GAP}px;
+  "
+  role="grid"
+  aria-label="Game board"
+>
+  <!-- Empty cell placeholders -->
+  {#each Array(GRID_SIZE * GRID_SIZE) as _, i}
+    {@const row = Math.floor(i / GRID_SIZE)}
+    {@const col = i % GRID_SIZE}
+    <div
+      class="absolute rounded-[3px]"
+      style="
+        width: {CELL_SIZE}px;
+        height: {CELL_SIZE}px;
+        transform: translate({col * (CELL_SIZE + GAP)}px, {row * (CELL_SIZE + GAP)}px);
+        background: #cdc1b4;
+      "
+    ></div>
+  {/each}
+
+  <!-- Tiles -->
+  {#each tiles as tile (tile.id || `${tile.row}-${tile.col}`)}
+    <Tile value={tile.value} row={tile.row} col={tile.col} />
+  {/each}
+</div>
diff --git a/bmad/src/components/Tile.svelte b/bmad/src/components/Tile.svelte
new file mode 100644
index 0000000..cfc57a1
--- /dev/null
+++ b/bmad/src/components/Tile.svelte
@@ -0,0 +1,29 @@
+<script>
+  import { TILE_COLORS } from '../lib/constants.js';
+
+  let { value, row, col } = $props();
+
+  let colors = $derived(TILE_COLORS[value] || TILE_COLORS.super);
+
+  const GAP = 15;
+  const CELL_SIZE = 106.25;
+
+  let x = $derived(col * (CELL_SIZE + GAP));
+  let y = $derived(row * (CELL_SIZE + GAP));
+</script>
+
+<div
+  class="absolute flex items-center justify-center font-bold rounded-[3px]"
+  style="
+    width: {CELL_SIZE}px;
+    height: {CELL_SIZE}px;
+    transform: translate({x}px, {y}px);
+    background: {colors.bg};
+    color: {colors.text};
+    font-size: 55px;
+  "
+  role="gridcell"
+  aria-label="Tile: {value}"
+>
+  {value}
+</div>