diff --git a/e2e/fight-replay.spec.ts b/e2e/fight-replay.spec.ts
new file mode 100644
index 0000000..89d1df4
--- /dev/null
+++ b/e2e/fight-replay.spec.ts
@@ -0,0 +1,31 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('fight replay', () => {
+  test('arena page loads without JS errors', async ({ page }) => {
+    const jsErrors: string[] = []
+    page.on('pageerror', err => jsErrors.push(err.message))
+
+    await page.goto('/arena')
+    await page.waitForTimeout(2000)
+
+    // Filter out expected errors (e.g., missing API data in test env)
+    const criticalErrors = jsErrors.filter(e =>
+      e.includes('TypeError') || e.includes('ReferenceError') || e.includes('SyntaxError')
+    )
+    expect(criticalErrors).toHaveLength(0)
+  })
+
+  test('fight page with invalid ID shows error gracefully', async ({ page }) => {
+    const jsErrors: string[] = []
+    page.on('pageerror', err => jsErrors.push(err.message))
+
+    await page.goto('/arena/nonexistent-fight-id')
+    await page.waitForTimeout(2000)
+
+    // Should not crash — may show error state or redirect
+    const criticalErrors = jsErrors.filter(e =>
+      e.includes('ReferenceError') || e.includes('SyntaxError')
+    )
+    expect(criticalErrors).toHaveLength(0)
+  })
+})
diff --git a/e2e/leaderboard.spec.ts b/e2e/leaderboard.spec.ts
new file mode 100644
index 0000000..2ed795c
--- /dev/null
+++ b/e2e/leaderboard.spec.ts
@@ -0,0 +1,27 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('leaderboard', () => {
+  test('leaderboard page loads and shows rankings header', async ({ page }) => {
+    await page.goto('/leaderboard')
+
+    // Should show the rankings header
+    await expect(page.getByText(/rankings/i).first()).toBeVisible({ timeout: 10_000 })
+  })
+
+  test('leaderboard has season toggle buttons', async ({ page }) => {
+    await page.goto('/leaderboard')
+
+    // Should have season/alltime toggle
+    await expect(page.getByText(/this season/i).first()).toBeVisible({ timeout: 10_000 })
+    await expect(page.getByText(/all time/i).first()).toBeVisible()
+  })
+
+  test('leaderboard shows tier column headers', async ({ page }) => {
+    await page.goto('/leaderboard')
+    await page.waitForTimeout(2000)
+
+    // Should show table headers for rankings
+    const content = await page.textContent('body')
+    expect(content).toMatch(/elo|tier|fighter/i)
+  })
+})
diff --git a/e2e/signup-bot.spec.ts b/e2e/signup-bot.spec.ts
new file mode 100644
index 0000000..238fa61
--- /dev/null
+++ b/e2e/signup-bot.spec.ts
@@ -0,0 +1,34 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('bot registration flow', () => {
+  test('navigate to join page and see login step', async ({ page }) => {
+    await page.goto('/join')
+    // Should show login options
+    await expect(page.getByText(/sign in/i).first()).toBeVisible({ timeout: 10_000 })
+  })
+
+  test('generate new identity shows choose-mode step', async ({ page }) => {
+    await page.goto('/join')
+    // Click "Generate New Identity" button
+    const genButton = page.getByText(/generate new identity/i)
+    await genButton.click()
+
+    // Should advance to choose-mode step
+    await expect(page.getByText(/I BUILD BOTS/i)).toBeVisible({ timeout: 5_000 })
+    await expect(page.getByText(/I FIGHT MYSELF/i)).toBeVisible()
+  })
+
+  test('select bot mode shows archetype picker', async ({ page }) => {
+    await page.goto('/join')
+
+    // Generate identity
+    await page.getByText(/generate new identity/i).click()
+    await expect(page.getByText(/I BUILD BOTS/i)).toBeVisible({ timeout: 5_000 })
+
+    // Choose bot mode
+    await page.getByText(/I BUILD BOTS/i).click()
+
+    // Should show character/archetype picker
+    await expect(page.getByText(/pick.*character/i).first()).toBeVisible({ timeout: 5_000 })
+  })
+})
diff --git a/e2e/signup-human.spec.ts b/e2e/signup-human.spec.ts
new file mode 100644
index 0000000..5e3868f
--- /dev/null
+++ b/e2e/signup-human.spec.ts
@@ -0,0 +1,17 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('human registration flow', () => {
+  test('select human mode shows avatar picker', async ({ page }) => {
+    await page.goto('/join')
+
+    // Generate identity
+    await page.getByText(/generate new identity/i).click()
+    await expect(page.getByText(/I FIGHT MYSELF/i)).toBeVisible({ timeout: 5_000 })
+
+    // Choose human mode
+    await page.getByText(/I FIGHT MYSELF/i).click()
+
+    // Should show human avatar picker
+    await expect(page.getByText(/pick.*avatar/i).first()).toBeVisible({ timeout: 5_000 })
+  })
+})