diff --git a/.github/workflows/ci_cd.yml b/.github/workflows/ci_cd.yml
index d6420d6..ba73a5d 100644
--- a/.github/workflows/ci_cd.yml
+++ b/.github/workflows/ci_cd.yml
@@ -37,6 +37,9 @@ jobs:
         run: docker-compose -f docker-compose.testing.yml build helloworld
 
       - name: Run Cypress Tests
+        env:
+          GOOGLE_CLIENT_ID: ${{ secrets.GOOGLE_CLIENT_ID }}
+          GOOGLE_CLIENT_SECRET: ${{ secrets.GOOGLE_CLIENT_SECRET }}
         run: docker-compose -f docker-compose.testing.yml run cypress
 
       - name: Tear Down Test Environment
diff --git a/README.md b/README.md
index 4c91d0a..529fb1d 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,10 @@ Run everything (frontend, backend, db, swagger, quests):
     docker compose build
     docker compose up -d
 
+If you want to enable social login, you should have OAuth client token in a `.env` file:
+
+    docker compose --env-file .env up -d
+
 ## Testing
 
 Run Cypress locally, using the current development containers:
@@ -42,6 +46,17 @@ Run Cypress in container, create brand-new containers along with it:
     docker compose -f docker-compose.prod.yml pull
     docker compose -f docker-compose.prod.yml up -d
 
+To enable social login, you should have OAuth client token in a `.env` file:
+You can copy from `example.env`
+
+    # .env
+    GOOGLE_CLIENT_ID=...
+    GOOGLE_CLIENT_SECRET=...
+
+To enable it:
+
+    docker compose --env-file .env -f docker-compose.prod.yml up -d
+
 ## Standalone App (without Docker)
 
 Source: `app/`
diff --git a/app/src/components/AuthenticationPart.vue b/app/src/components/AuthenticationPart.vue
index a9f16d1..8ac1a14 100644
--- a/app/src/components/AuthenticationPart.vue
+++ b/app/src/components/AuthenticationPart.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { ref } from 'vue'
+import { computed, onMounted, ref } from 'vue'
 import { useRouter } from 'vue-router'
 import { login, register } from '../utils/auth'
 import api from '../utils/api'
@@ -13,6 +13,19 @@ const emailInput = ref(null)
 const password = ref('')
 const errorMessage = ref('')
 
+const availableMethods = ref({})
+onMounted(async () => {
+  const res = await api.get('/auth/available-methods')
+  availableMethods.value = res.data
+})
+
+const hasSocialLogins = computed(() => {
+  // There is any key other than 'local' is true
+  return Object.keys(availableMethods.value).some(
+    (method) => method !== 'local' && availableMethods.value[method]
+  )
+})
+
 const success = () => {
   router.push({ name: 'game' })
 }
@@ -58,7 +71,6 @@ async function check() {
 }
 
 function handleRegister() {
-  console.log('register', username.value, email.value, password.value)
   register(username.value, email.value, password.value)
     .then((isSuccess) => {
       if (isSuccess) {
@@ -167,6 +179,19 @@ const goBack = () => {
       >
         <span>Back to Login</span>
       </button>
+      <div v-if="hasSocialLogins">
+        <hr class="my-8" />
+        <p class="flex justify-center font-semibold text-text text-base">
+          Log in with social account
+        </p>
+        <a
+          v-if="availableMethods.google"
+          class="inline-flex justify-center rounded-lg text-sm font-black py-2 mt-3 bg-icon-google text-text w-full"
+          href="/api/v1/auth/google"
+        >
+          <span>Google</span>
+        </a>
+      </div>
     </form>
   </div>
 </template>
diff --git a/app/src/components/TerminalPart.vue b/app/src/components/TerminalPart.vue
index bdedd4d..ed09178 100644
--- a/app/src/components/TerminalPart.vue
+++ b/app/src/components/TerminalPart.vue
@@ -46,7 +46,7 @@ function resizeScreen() {
     // 窗口大小改变时，触发xterm的resize方法使自适应
     fitAddon.fit()
   } catch (e) {
-    console.log('e', e.message)
+    console.error('e', e.message)
   }
 }
 window.addEventListener('resize', resizeScreen)
diff --git a/app/src/router.js b/app/src/router.js
index 86a7894..40dd4dc 100644
--- a/app/src/router.js
+++ b/app/src/router.js
@@ -28,7 +28,6 @@ const router = createRouter({
 })
 
 router.beforeEach(async (to, from, next) => {
-  console.log(to, from)
   const loggedIn = await isLoggedIn()
   // Check if the route requires authentication
   if (to.meta.requiresAuth && !loggedIn) {
diff --git a/app/src/utils/auth.js b/app/src/utils/auth.js
index deb5e9d..8e6a478 100644
--- a/app/src/utils/auth.js
+++ b/app/src/utils/auth.js
@@ -8,8 +8,7 @@ export async function isLoggedIn() {
 
 export const login = async (username, password) => {
   try {
-    const res = await api.post('/auth/login', { username, password })
-    console.log(res.data)
+    await api.post('/auth/login', { username, password })
     return true
   } catch (err) {
     if (err.response?.status === 401) {
diff --git a/app/src/utils/session.js b/app/src/utils/session.js
index ada7725..0869c70 100644
--- a/app/src/utils/session.js
+++ b/app/src/utils/session.js
@@ -38,7 +38,6 @@ class SessionManager {
   }
 
   handleHintUpdate(event) {
-    console.log(event)
     this.hints.value = [...this.hints.value, ...event]
   }
 
diff --git a/app/tailwind.config.js b/app/tailwind.config.js
index 403273c..6864fdc 100644
--- a/app/tailwind.config.js
+++ b/app/tailwind.config.js
@@ -22,6 +22,9 @@ export default {
         border: {
           DEFAULT: '#526B4E',
         },
+        icon: {
+          google: '#DB4437',
+        },
       },
     },
   },
diff --git a/app/vite.config.js b/app/vite.config.js
index 133a5f9..9f8466e 100644
--- a/app/vite.config.js
+++ b/app/vite.config.js
@@ -8,11 +8,11 @@ export default defineConfig({
     proxy: {
       '/api': {
         target: process.env.API_TARGET || 'http://localhost:3000',
-        changeOrigin: true,
+        changeOrigin: false,
       },
       '/socket.io': {
         target: process.env.API_TARGET || 'ws://localhost:3000',
-        changeOrigin: true,
+        changeOrigin: false,
         ws: true,
       },
     },
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 6611c98..5a23b35 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -20,6 +20,8 @@ services:
       - players
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
+    env_file:
+      - .env
     environment:
       - MONGO_URL=mongodb://user:user-password@db:27017/odyssey-test
       - DOCKER_NETWORK=linux-odyssey-players
@@ -39,6 +41,8 @@ services:
       - MONGO_USER=user
       - MONGO_PASS=user-password
       - MONGO_DB=odyssey-test
+      - GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID}
+      - GOOGLE_CLIENT_SECRET=${GOOGLE_CLIENT_SECRET}
 
   base:
     image: lancatlin/linux-odyssey:base
diff --git a/docker-compose.testing.yml b/docker-compose.testing.yml
index 9232f84..a1ad2ea 100644
--- a/docker-compose.testing.yml
+++ b/docker-compose.testing.yml
@@ -39,6 +39,8 @@ services:
     environment:
       - MONGO_URL=mongodb://user:user-password@db-test:27017/odyssey-test
       - DOCKER_NETWORK=linux-odyssey-players
+      - GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID}
+      - GOOGLE_CLIENT_SECRET=${GOOGLE_CLIENT_SECRET}
 
   db-test:
     image: mongo
diff --git a/docker-compose.yml b/docker-compose.yml
index 1a637f5..c0afae7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -30,6 +30,8 @@ services:
       - MONGO_URL=mongodb://db:27017/odyssey-test
       - DOCKER_NETWORK=linux-odyssey-players
       - HOST_PWD=${PWD}
+      - GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID}
+      - GOOGLE_CLIENT_SECRET=${GOOGLE_CLIENT_SECRET}
   db:
     image: mongo
     networks:
diff --git a/docker-scripts.sh b/docker-scripts.sh
index 7fcb8c3..88604d1 100755
--- a/docker-scripts.sh
+++ b/docker-scripts.sh
@@ -2,7 +2,7 @@
 
 inspect() {
   # default to app, allow overriding by $1
-  SERVICE=${1:-app}
+  SERVICE=${1:-backend}
   echo "Running docker-compose logs for service [$SERVICE]..."
   docker compose logs $SERVICE -f --no-log-prefix
 }
diff --git a/example.env b/example.env
new file mode 100644
index 0000000..17418ff
--- /dev/null
+++ b/example.env
@@ -0,0 +1,2 @@
+GOOGLE_CLIENT_ID=
+GOOGLE_CLIENT_SECRET=
\ No newline at end of file
diff --git a/server/package.json b/server/package.json
index 60519fb..b88362a 100644
--- a/server/package.json
+++ b/server/package.json
@@ -22,6 +22,7 @@
     "mongoose": "^7.4.0",
     "node-schedule": "^2.1.1",
     "passport": "^0.6.0",
+    "passport-google-oidc": "^0.1.0",
     "passport-jwt": "^4.0.1",
     "passport-local": "^1.0.0",
     "socket.io": "^4.7.1",
diff --git a/server/src/api/controllers/authController.js b/server/src/api/controllers/authController.js
index 5fe8b2d..2d8cf15 100644
--- a/server/src/api/controllers/authController.js
+++ b/server/src/api/controllers/authController.js
@@ -79,7 +79,7 @@ export async function register(req, res, next) {
   if (await User.exists({ email })) {
     res.status(409).json({
       type: 'email',
-      message: 'username already exists',
+      message: 'email already exists',
     })
     return
   }
diff --git a/server/src/api/routes/auth.js b/server/src/api/routes/auth.js
index fb52e09..d94c3c0 100644
--- a/server/src/api/routes/auth.js
+++ b/server/src/api/routes/auth.js
@@ -1,6 +1,8 @@
 import { Router } from 'express'
 import passport from 'passport'
 
+import enabledMethods from '../../auth/passport.js'
+
 import {
   register,
   checkUsername,
@@ -26,4 +28,19 @@ router.get('/check-username', checkUsername)
 
 router.get('/check-session', checkSession)
 
+router.get('/available-methods', (req, res) => {
+  res.json(enabledMethods)
+})
+
+if (enabledMethods.google) {
+  router.get('/google', passport.authenticate('google'))
+  router.get(
+    '/google/callback',
+    passport.authenticate('google', {
+      successRedirect: '/',
+      failureRedirect: '/login',
+    })
+  )
+}
+
 export default router
diff --git a/server/src/api/socket.js b/server/src/api/socket.js
index df98867..4bdc6bb 100644
--- a/server/src/api/socket.js
+++ b/server/src/api/socket.js
@@ -27,8 +27,6 @@ export function pushToSession(sessionId, event, ...args) {
 }
 
 async function connectClient(socket) {
-  console.log('Connected to the client.')
-
   const user = socket.request.session?.passport?.user
   if (!user) {
     socket.send('User not found.')
@@ -85,7 +83,6 @@ async function connectClient(socket) {
   listenToSession(session.id, socketCallback)
 
   socket.on('disconnect', () => {
-    console.log('Disconnected from the client.')
     stream.socket.write('exit\n')
     removeFromSession(session.id, socketCallback)
     stream.destroy()
diff --git a/server/src/auth/googleStrategy.js b/server/src/auth/googleStrategy.js
new file mode 100644
index 0000000..2edb2e2
--- /dev/null
+++ b/server/src/auth/googleStrategy.js
@@ -0,0 +1,51 @@
+import GoogleStrategy from 'passport-google-oidc'
+
+import config from '../config.js'
+import User from '../models/user.js'
+
+function verify(issuer, profile, cb) {
+  process.nextTick(async () => {
+    const email = profile.emails[0]?.value
+    if (!email) {
+      cb(new Error('No email found'))
+      return
+    }
+
+    let user = await User.findOne({ 'google.id': profile.id })
+    if (!user) {
+      user = await User.findOne({ email })
+      const google = {
+        id: profile.id,
+        displayName: profile.displayName,
+      }
+      if (!user) {
+        user = new User({
+          email,
+          google,
+        })
+      } else if (user.google?.id) {
+        cb(new Error('Email already used and binded to another account'))
+        return
+      } else {
+        user.google = google
+      }
+      await user.save()
+    }
+
+    cb(null, user)
+  })
+}
+
+const enabled = config.google.clientID && config.google.clientSecret
+
+export default enabled
+  ? new GoogleStrategy(
+      {
+        clientID: config.google.clientID,
+        clientSecret: config.google.clientSecret,
+        callbackURL: '/api/v1/auth/google/callback',
+        scope: ['profile', 'email'],
+      },
+      verify
+    )
+  : null
diff --git a/server/src/auth/passport.js b/server/src/auth/passport.js
index 068050e..e2f4525 100644
--- a/server/src/auth/passport.js
+++ b/server/src/auth/passport.js
@@ -1,9 +1,21 @@
 import passport from 'passport'
-import PasswordStrategy from './passwordStrategy.js'
-import JwtStrategy from './jwtStrategy.js'
+import passwordStrategy from './passwordStrategy.js'
+import jwtStrategy from './jwtStrategy.js'
+import googleStrategy from './googleStrategy.js'
 
-passport.use(PasswordStrategy)
-passport.use(JwtStrategy)
+passport.use(passwordStrategy)
+passport.use(jwtStrategy)
+
+const enabledMethods = {
+  local: true,
+  google: googleStrategy !== null,
+}
+
+console.log('Enabled login methods', enabledMethods)
+
+if (enabledMethods.google) {
+  passport.use(googleStrategy)
+}
 
 passport.serializeUser((user, done) => {
   process.nextTick(() => {
@@ -20,3 +32,5 @@ passport.deserializeUser((user, done) => {
     done(null, user)
   })
 })
+
+export default enabledMethods
diff --git a/server/src/config.js b/server/src/config.js
index 1bda384..78377cd 100644
--- a/server/src/config.js
+++ b/server/src/config.js
@@ -10,4 +10,8 @@ export default {
   hostPwd: get('HOST_PWD', ''),
   containerExpiry: get('EXPIRY', 1000 * 60 * 60),
   sessionMaxAge: get('SESSION_MAX_AGE', 1000 * 60 * 60 * 24 * 7),
+  google: {
+    clientID: get('GOOGLE_CLIENT_ID', ''),
+    clientSecret: get('GOOGLE_CLIENT_SECRET', ''),
+  },
 }
diff --git a/server/src/models/user.js b/server/src/models/user.js
index 5899e90..1c3b891 100644
--- a/server/src/models/user.js
+++ b/server/src/models/user.js
@@ -4,7 +4,8 @@ const User = model('User', {
   username: {
     type: String,
     unique: true,
-    required: true,
+    required: false, // should be required,
+    // but need to let social login users to pick one after login
   },
   email: {
     type: String,
@@ -12,6 +13,10 @@ const User = model('User', {
     required: true,
   },
   hashedPassword: String,
+  google: {
+    id: String,
+    displayName: String,
+  },
 })
 
 export default User
diff --git a/server/swagger.yaml b/server/swagger.yaml
index c3c6bb7..b9f09b3 100644
--- a/server/swagger.yaml
+++ b/server/swagger.yaml
@@ -319,6 +319,30 @@ paths:
                     type: string
                     example: Username is already taken
 
+  /auth/available-methods:
+    get:
+      summary: Get available login methods
+      responses:
+        '200':
+          description: Available login methods
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  local:
+                    type: boolean
+                    example: true
+                  github:
+                    type: boolean
+                    example: true
+                  google:
+                    type: boolean
+                    example: true
+                  facebook:
+                    type: boolean
+                    example: true
+
   /auth/check-session:
     get:
       summary: Check if the session is valid
@@ -334,6 +358,36 @@ paths:
                     type: boolean
                     example: true
 
+  /auth/google:
+    get:
+      summary: Initiate OAuth2 login with Google
+      operationId: initiateOAuth
+      security:
+        - GoogleOAuth: []
+      responses:
+        302:
+          description: Redirect to Google's OAuth 2.0 authorization endpoint
+        500:
+          description: Internal Server Error
+  /auth/google/callback:
+    get:
+      summary: OAuth2 callback endpoint
+      operationId: oauthCallback
+      parameters:
+        - name: code
+          in: query
+          description: Authorization code from Google
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: Successful Operation
+        400:
+          description: Bad Request
+        500:
+          description: Internal Server Error
+
   /quests:
     get:
       summary: Get quests list
@@ -571,3 +625,15 @@ components:
       type: apiKey
       in: cookie
       name: connect.sid
+
+    GoogleOAuth:
+      type: oauth2
+      flows:
+        authorizationCode:
+          authorizationUrl: https://accounts.google.com/o/oauth2/auth
+          tokenUrl: https://accounts.google.com/o/oauth2/token
+          scopes:
+            # Define your scopes here
+            openid: OpenID
+            profile: User profile
+            email: User email
diff --git a/server/tests/utils/auth.test.js b/server/tests/utils/auth.test.js
index 3df34ed..4254ed8 100644
--- a/server/tests/utils/auth.test.js
+++ b/server/tests/utils/auth.test.js
@@ -33,12 +33,10 @@ test('check valid email', () => {
   ]
 
   validEmails.forEach((email) => {
-    console.log(email)
     expect(isValidEmail(email)).toBe(true)
   })
 
   invalidEmails.forEach((email) => {
-    console.log(email)
     expect(isValidEmail(email)).toBe(false)
   })
 })
diff --git a/yarn.lock b/yarn.lock
index a85225b..40e7f1d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4489,6 +4489,11 @@ nth-check@^2.0.1:
   dependencies:
     boolbase "^1.0.0"
 
+oauth@0.9.x:
+  version "0.9.15"
+  resolved "https://registry.yarnpkg.com/oauth/-/oauth-0.9.15.tgz#bd1fefaf686c96b75475aed5196412ff60cfb9c1"
+  integrity sha512-a5ERWK1kh38ExDEfoO6qUHJb32rd7aYmPHuyCu3Fta/cnICvYmgd2uhuKXvPD+PXB+gCEYYEaQdIRAjCOwAKNA==
+
 object-assign@^4, object-assign@^4.0.1, object-assign@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
@@ -4659,6 +4664,13 @@ parseurl@~1.3.3:
   resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
   integrity sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ==
 
+passport-google-oidc@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/passport-google-oidc/-/passport-google-oidc-0.1.0.tgz#585790ba03864c0238cb89912d7e2a958086b5b0"
+  integrity sha512-/TtFXaWvmubm5kXNoJMyzBfxhnZ0lnBPA6w6rmQMP9klmHZf0ArE8IrIEt3yAHoiDzGx4eTO7YasKQFbPsNtVA==
+  dependencies:
+    passport-openidconnect "0.1.x"
+
 passport-jwt@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/passport-jwt/-/passport-jwt-4.0.1.tgz#c443795eff322c38d173faa0a3c481479646ec3d"
@@ -4674,6 +4686,14 @@ passport-local@^1.0.0:
   dependencies:
     passport-strategy "1.x.x"
 
+passport-openidconnect@0.1.x:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/passport-openidconnect/-/passport-openidconnect-0.1.1.tgz#83921ff5f87f634079f65262dada834af1972244"
+  integrity sha512-r0QJiWEzwCg2MeCIXVP5G6YxVRqnEsZ2HpgKRthZ9AiQHJrgGUytXpsdcGF9BRwd3yMrEesb/uG/Yxb86rrY0g==
+  dependencies:
+    oauth "0.9.x"
+    passport-strategy "1.x.x"
+
 passport-strategy@1.x.x, passport-strategy@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/passport-strategy/-/passport-strategy-1.0.0.tgz#b5539aa8fc225a3d1ad179476ddf236b440f52e4"