diff --git a/skills/rudder-web-sdk/SKILL.md b/skills/rudder-web-sdk/SKILL.md
index e13b3fe..1e61112 100644
--- a/skills/rudder-web-sdk/SKILL.md
+++ b/skills/rudder-web-sdk/SKILL.md
@@ -1,6 +1,6 @@
 ---
 name: rudder-web-sdk
-description: Use when working with the Rudder TypeScript/JavaScript SDK (@rudder/js-sdk) — the browser/player-facing SDK for the Rudder LiveOps platform. Covers client setup, device/custom auth, observable domains (player, inventory, catalog, stores, remote config, storage), leaderboards, quests, battle pass, scenario effects, and error handling. Load this whenever code imports from @rudder/js-sdk or RudderClient appears.
+description: Use when working with the Rudder TypeScript/JavaScript SDK (@rudder/js-sdk) — the browser/player-facing SDK for the Rudder LiveOps platform. Covers client setup, device/google/apple/custom auth, identity linking, observable domains (player, inventory, catalog, stores, remote config, storage), leaderboards, quests, battle pass, scenario effects, and error handling. Load this whenever code imports from @rudder/js-sdk or RudderClient appears.
 ---
 
 # Rudder Web SDK (@rudder/js-sdk)
@@ -51,12 +51,22 @@ drop cached state.
 
 ```ts
 await client.auth.loginWithDevice({ region, language, nickname }); // device id auto-generated/persisted
-await client.auth.loginWithCustom({ customData, region, language, nickname });
+await client.auth.loginWithGoogle({ idToken, region, language, nickname });
+await client.auth.loginWithApple({ idToken, region, language, nickname });
+await client.auth.loginWithCustom({ customData, provider?, region, language, nickname });
+// identity linking (requires an active session):
+await client.auth.linkWithGoogle(idToken);
+await client.auth.linkWithApple(idToken);
+await client.auth.linkWithCustom({ customData, provider? });
+await client.auth.unlinkIdentity(provider); // 'device' | 'google' | 'apple' | 'custom' | 'custom:<name>'
 client.auth.logout();
 client.auth.isAuthenticated;                       // boolean
 client.auth.onAuthStateChange(cb);                 // fires immediately, returns unsubscribe
 ```
 
+Linked identities are listed on the profile: `client.player.data.identities`
+(`PlayerProfileIdentity { provider, subject, createdAt }`).
+
 Tokens are saved to the `TokenStore` automatically. The transport injects
 `Authorization: Bearer <token>`, retries GETs, and single-flight refreshes on
 401; a failed refresh clears tokens and emits `signed-out`. Details:
diff --git a/skills/rudder-web-sdk/reference/auth.md b/skills/rudder-web-sdk/reference/auth.md
index ee3213b..1f41386 100644
--- a/skills/rudder-web-sdk/reference/auth.md
+++ b/skills/rudder-web-sdk/reference/auth.md
@@ -1,14 +1,20 @@
 # Auth — `client.auth`
 
 `AuthService` (source: `src/auth/AuthService.ts`). Player authentication:
-device ID login (primary for game clients), custom webhook login, logout, and
-auth state observation.
+device ID login (primary for game clients), Google / Apple sign-in, custom
+webhook login, identity linking/unlinking, logout, and auth state observation.
 
 ## Methods
 
 ```ts
 loginWithDevice(options?: LoginWithDeviceOptions): Promise<LoginViaDeviceResponse>
+loginWithGoogle(options: LoginWithGoogleOptions): Promise<LoginViaGoogleResponse>
+loginWithApple(options: LoginWithAppleOptions): Promise<LoginViaAppleResponse>
 loginWithCustom(options: LoginWithCustomOptions): Promise<LoginViaCustomResponse>
+linkWithGoogle(idToken: string): Promise<void>
+linkWithApple(idToken: string): Promise<void>
+linkWithCustom(options: LinkWithCustomOptions): Promise<void>
+unlinkIdentity(provider: string): Promise<void>
 logout(): void
 get isAuthenticated(): boolean
 onAuthStateChange(listener: AuthStateListener): () => void
@@ -28,11 +34,27 @@ The device ID is auto-generated on first call and persisted in localStorage
 (`src/device/DeviceId.ts`). The request also carries the client's
 `projectKey`.
 
+### `LoginWithGoogleOptions` / `LoginWithAppleOptions`
+
+```ts
+{
+  idToken: string;    // required — Google ID token / Apple identity token
+  region?: string;    // default 'global'
+  language?: string;  // default 'en'
+  nickname?: string;  // omitted from the request when not set
+}
+```
+
+The client obtains the `idToken` from the provider's own sign-in flow
+(Google Identity Services, Sign in with Apple) and forwards it to
+`POST /sdk/v1/authorization/google` or `/sdk/v1/authorization/apple`.
+
 ### `LoginWithCustomOptions`
 
 ```ts
 {
   customData: Record<string, unknown>;  // required — forwarded to the project's custom auth webhook
+  provider?: string;                    // custom provider name; omitted = the default provider
   region?: string;                      // default 'global'
   language?: string;                    // default 'en'
   nickname?: string;
@@ -43,6 +65,8 @@ The device ID is auto-generated on first call and persisted in localStorage
 
 ```ts
 interface LoginViaDeviceResponse { accessToken?: string; refreshToken?: string }
+interface LoginViaGoogleResponse { accessToken?: string; refreshToken?: string }
+interface LoginViaAppleResponse { accessToken?: string; refreshToken?: string }
 interface LoginViaCustomResponse { accessToken?: string; refreshToken?: string }
 ```
 
@@ -50,6 +74,36 @@ On success both tokens are saved to the client's `TokenStore`, the runtime
 starts (domains warmed, scenario engine restored, `player_login` event fired),
 and the state flips to `'signed-in'`.
 
+## Identity linking
+
+`linkWithGoogle` / `linkWithApple` / `linkWithCustom` attach an additional
+identity to the currently signed-in player; `unlinkIdentity` detaches one.
+All four require an active session — the access token is sent automatically
+(transport level). They return nothing (HTTP 204).
+
+```ts
+await client.auth.linkWithGoogle(idToken);
+await client.auth.linkWithApple(idToken);
+await client.auth.linkWithCustom({ customData, provider }); // provider optional
+await client.auth.unlinkIdentity('custom:my-backend');
+```
+
+### `LinkWithCustomOptions`
+
+```ts
+{
+  customData: Record<string, unknown>;  // required
+  provider?: string;                    // custom provider name; omitted = the default provider
+}
+```
+
+`unlinkIdentity(provider)` takes the full provider string: `device`,
+`google`, `apple`, `custom`, or `custom:<name>`.
+
+Linked identities appear on the player profile:
+`client.player.data.identities: PlayerProfileIdentity[]` with
+`{ provider: string; subject: string; createdAt: string }`.
+
 ## Environments
 
 A project has two environments, `staging` and `prod`. The SDK key you pass as
diff --git a/skills/rudder-web-sdk/reference/player.md b/skills/rudder-web-sdk/reference/player.md
index afff3d7..57df4cf 100644
--- a/skills/rudder-web-sdk/reference/player.md
+++ b/skills/rudder-web-sdk/reference/player.md
@@ -23,10 +23,17 @@ await client.player.reload();  // force refetch
 
 ```ts
 interface PlayerProfile {
+  identities?: PlayerProfileIdentity[];
   player?: Player;
   wallets?: Wallet[];
 }
 
+interface PlayerProfileIdentity {
+  createdAt: string;
+  provider: string;  // 'device' | 'google' | 'apple' | 'custom' | 'custom:<name>'
+  subject: string;
+}
+
 interface Player {
   createdAt?: string;
   id?: string;
diff --git a/src/auth/AuthService.ts b/src/auth/AuthService.ts
index 41127d5..0b23213 100644
--- a/src/auth/AuthService.ts
+++ b/src/auth/AuthService.ts
@@ -1,15 +1,21 @@
 /**
  * AuthService — player authentication.
  *
- * Handles login via device ID (the primary auth flow for game clients) or a
- * custom backend webhook, logout (token clearing), and auth state observation.
+ * Handles login via device ID (the primary auth flow for game clients), Google,
+ * Apple, or a custom backend webhook, identity linking/unlinking, logout
+ * (token clearing), and auth state observation.
  */
 
 import type { RudderContext } from '../core/context.js';
 import type { RemoteConfigShape } from '../state/RemoteConfigState.js';
 import { getOrCreateDeviceId } from '../device/DeviceId.js';
 import { api } from '../generated/api.js';
-import type { LoginViaCustomResponse, LoginViaDeviceResponse } from '../generated/auth.js';
+import type {
+  LoginViaAppleResponse,
+  LoginViaCustomResponse,
+  LoginViaDeviceResponse,
+  LoginViaGoogleResponse,
+} from '../generated/auth.js';
 
 export type AuthState = 'signed-in' | 'signed-out';
 
@@ -27,6 +33,8 @@ export interface LoginWithDeviceOptions {
 export interface LoginWithCustomOptions {
   /** Arbitrary payload forwarded to the developer's custom auth webhook. */
   customData: Record<string, unknown>;
+  /** Name of the custom auth provider; omitted means the default provider. */
+  provider?: string;
   /** Player's region code (default: "global"). */
   region?: string;
   /** Player's language code (default: "en"). */
@@ -35,6 +43,35 @@ export interface LoginWithCustomOptions {
   nickname?: string;
 }
 
+export interface LoginWithGoogleOptions {
+  /** Google ID token obtained from the Google sign-in flow. */
+  idToken: string;
+  /** Player's region code (default: "global"). */
+  region?: string;
+  /** Player's language code (default: "en"). */
+  language?: string;
+  /** Optional player nickname; omitted from the request when not set. */
+  nickname?: string;
+}
+
+export interface LoginWithAppleOptions {
+  /** Apple ID token (identity token) obtained from Sign in with Apple. */
+  idToken: string;
+  /** Player's region code (default: "global"). */
+  region?: string;
+  /** Player's language code (default: "en"). */
+  language?: string;
+  /** Optional player nickname; omitted from the request when not set. */
+  nickname?: string;
+}
+
+export interface LinkWithCustomOptions {
+  /** Arbitrary payload forwarded to the developer's custom auth webhook. */
+  customData: Record<string, unknown>;
+  /** Name of the custom auth provider; omitted means the default provider. */
+  provider?: string;
+}
+
 export class AuthService<TConfig extends RemoteConfigShape = RemoteConfigShape> {
   private readonly listeners = new Set<AuthStateListener>();
   private state: AuthState;
@@ -100,10 +137,11 @@ export class AuthService<TConfig extends RemoteConfigShape = RemoteConfigShape>
    * saved to the client's TokenStore.
    */
   async loginWithCustom(options: LoginWithCustomOptions): Promise<LoginViaCustomResponse> {
-    const { customData, region = 'global', language = 'en', nickname } = options;
+    const { customData, provider, region = 'global', language = 'en', nickname } = options;
     const response = await api.loginViaCustom(this.ctx, {
       key: this.ctx.options.projectKey,
       customData,
+      provider,
       region,
       language,
       nickname,
@@ -118,6 +156,90 @@ export class AuthService<TConfig extends RemoteConfigShape = RemoteConfigShape>
     return response;
   }
 
+  /**
+   * Authenticates with a Google ID token and returns access + refresh tokens.
+   *
+   * On success, tokens are saved to the client's TokenStore.
+   */
+  async loginWithGoogle(options: LoginWithGoogleOptions): Promise<LoginViaGoogleResponse> {
+    const { idToken, region = 'global', language = 'en', nickname } = options;
+    const response = await api.loginViaGoogle(this.ctx, {
+      key: this.ctx.options.projectKey,
+      idToken,
+      region,
+      language,
+      nickname,
+    });
+
+    this.ctx.options.tokenStore.saveTokens(
+      response.accessToken ?? '',
+      response.refreshToken ?? '',
+    );
+    await this.startRuntime();
+    this.setState('signed-in');
+    return response;
+  }
+
+  /**
+   * Authenticates with an Apple ID token and returns access + refresh tokens.
+   *
+   * On success, tokens are saved to the client's TokenStore.
+   */
+  async loginWithApple(options: LoginWithAppleOptions): Promise<LoginViaAppleResponse> {
+    const { idToken, region = 'global', language = 'en', nickname } = options;
+    const response = await api.loginViaApple(this.ctx, {
+      key: this.ctx.options.projectKey,
+      idToken,
+      region,
+      language,
+      nickname,
+    });
+
+    this.ctx.options.tokenStore.saveTokens(
+      response.accessToken ?? '',
+      response.refreshToken ?? '',
+    );
+    await this.startRuntime();
+    this.setState('signed-in');
+    return response;
+  }
+
+  /**
+   * Links a Google identity to the currently signed-in player. Requires an
+   * active session (the access token is sent automatically).
+   */
+  async linkWithGoogle(idToken: string): Promise<void> {
+    await api.linkViaGoogle(this.ctx, { idToken });
+  }
+
+  /**
+   * Links an Apple identity to the currently signed-in player. Requires an
+   * active session (the access token is sent automatically).
+   */
+  async linkWithApple(idToken: string): Promise<void> {
+    await api.linkViaApple(this.ctx, { idToken });
+  }
+
+  /**
+   * Links a custom identity to the currently signed-in player via the project's
+   * custom authorization webhook. Requires an active session.
+   */
+  async linkWithCustom(options: LinkWithCustomOptions): Promise<void> {
+    await api.linkViaCustom(this.ctx, {
+      customData: options.customData,
+      provider: options.provider,
+    });
+  }
+
+  /**
+   * Unlinks an identity from the currently signed-in player. The provider is
+   * the full provider string: `device`, `google`, `apple`, `custom`, or
+   * `custom:<name>`.
+   */
+  async unlinkIdentity(provider: string): Promise<void> {
+    await api.unlinkIdentity(this.ctx, { provider });
+  }
+
   /** Clears all stored tokens (logout). */
   logout(): void {
     this.ctx.options.tokenStore.clear();
diff --git a/src/generated/api.ts b/src/generated/api.ts
index 6afb89f..8e9e094 100644
--- a/src/generated/api.ts
+++ b/src/generated/api.ts
@@ -1,6 +1,6 @@
 // Code generated by apigen. DO NOT EDIT.
 
-import type { LoginViaCustomRequest, LoginViaCustomResponse, LoginViaDeviceRequest, LoginViaDeviceResponse, RefreshAccessTokenRequest, RefreshAccessTokenResponse } from './auth.js';
+import type { LinkViaAppleRequest, LinkViaCustomRequest, LinkViaGoogleRequest, LoginViaAppleRequest, LoginViaAppleResponse, LoginViaCustomRequest, LoginViaCustomResponse, LoginViaDeviceRequest, LoginViaDeviceResponse, LoginViaGoogleRequest, LoginViaGoogleResponse, RefreshAccessTokenRequest, RefreshAccessTokenResponse, UnlinkIdentityRequest } from './auth.js';
 import type { AddBattlePassXpRequest, AddBattlePassXpResponse, ClaimBattlePassRewardRequest, ClaimBattlePassRewardResponse, GetBattlePassProgressRequest, GetBattlePassProgressResponse, PurchaseBattlePassPremiumRequest, PurchaseBattlePassPremiumResponse } from './battlepass.js';
 import type { ListCatalogItemsResponse } from './catalog.js';
 import type { GetInventoryResponse } from './inventory.js';
@@ -118,6 +118,24 @@ export const api = {
   ): Promise<HandleScenarioCallbackResponse> =>
     t.request<HandleScenarioCallbackResponse>('POST', '/sdk/v1/scenarios/callback', body),
 
+  linkViaApple: (
+    t: Transport,
+    body: LinkViaAppleRequest,
+  ): Promise<void> =>
+    t.request<void>('POST', '/sdk/v1/authorization/apple/link', body),
+
+  linkViaCustom: (
+    t: Transport,
+    body: LinkViaCustomRequest,
+  ): Promise<void> =>
+    t.request<void>('POST', '/sdk/v1/authorization/custom/link', body),
+
+  linkViaGoogle: (
+    t: Transport,
+    body: LinkViaGoogleRequest,
+  ): Promise<void> =>
+    t.request<void>('POST', '/sdk/v1/authorization/google/link', body),
+
   listCatalogItems: (
     t: Transport,
   ): Promise<ListCatalogItemsResponse> =>
@@ -143,6 +161,12 @@ export const api = {
   ): Promise<ListStoresResponse> =>
     t.request<ListStoresResponse>('GET', '/sdk/v1/stores'),
 
+  loginViaApple: (
+    t: Transport,
+    body: LoginViaAppleRequest,
+  ): Promise<LoginViaAppleResponse> =>
+    t.request<LoginViaAppleResponse>('POST', '/sdk/v1/authorization/apple', body),
+
   loginViaCustom: (
     t: Transport,
     body: LoginViaCustomRequest,
@@ -155,6 +179,12 @@ export const api = {
   ): Promise<LoginViaDeviceResponse> =>
     t.request<LoginViaDeviceResponse>('POST', '/sdk/v1/authorization/device', body),
 
+  loginViaGoogle: (
+    t: Transport,
+    body: LoginViaGoogleRequest,
+  ): Promise<LoginViaGoogleResponse> =>
+    t.request<LoginViaGoogleResponse>('POST', '/sdk/v1/authorization/google', body),
+
   purchaseBattlePassPremium: (
     t: Transport,
     body: PurchaseBattlePassPremiumRequest,
@@ -193,6 +223,12 @@ export const api = {
   ): Promise<TriggerScenarioResponse> =>
     t.request<TriggerScenarioResponse>('POST', '/sdk/v1/scenarios/trigger', body),
 
+  unlinkIdentity: (
+    t: Transport,
+    body: UnlinkIdentityRequest,
+  ): Promise<void> =>
+    t.request<void>('POST', '/sdk/v1/authorization/unlink', body),
+
   updateProjectStorage: (
     t: Transport,
     body: UpdateProjectStorageRequest,
diff --git a/src/generated/auth.ts b/src/generated/auth.ts
index ab2414a..bcb3bc9 100644
--- a/src/generated/auth.ts
+++ b/src/generated/auth.ts
@@ -1,10 +1,37 @@
 // Code generated by apigen. DO NOT EDIT.
 
+export interface LinkViaAppleRequest {
+  "idToken": string;
+}
+
+export interface LinkViaCustomRequest {
+  "customData": { [key: string]: unknown };
+  "provider"?: string;
+}
+
+export interface LinkViaGoogleRequest {
+  "idToken": string;
+}
+
+export interface LoginViaAppleRequest {
+  "idToken": string;
+  "key": string;
+  "language": string;
+  "nickname"?: string;
+  "region": string;
+}
+
+export interface LoginViaAppleResponse {
+  "accessToken"?: string;
+  "refreshToken"?: string;
+}
+
 export interface LoginViaCustomRequest {
   "customData"?: { [key: string]: unknown };
   "key"?: string;
   "language"?: string;
   "nickname"?: string;
+  "provider"?: string;
   "region"?: string;
 }
 
@@ -26,6 +53,19 @@ export interface LoginViaDeviceResponse {
   "refreshToken"?: string;
 }
 
+export interface LoginViaGoogleRequest {
+  "idToken": string;
+  "key": string;
+  "language": string;
+  "nickname"?: string;
+  "region": string;
+}
+
+export interface LoginViaGoogleResponse {
+  "accessToken"?: string;
+  "refreshToken"?: string;
+}
+
 export interface RefreshAccessTokenRequest {
   "refreshToken"?: string;
 }
@@ -35,3 +75,7 @@ export interface RefreshAccessTokenResponse {
   "refreshToken"?: string;
 }
 
+export interface UnlinkIdentityRequest {
+  "provider": string;
+}
+
diff --git a/src/generated/player.ts b/src/generated/player.ts
index abe2ce7..fc2bbe1 100644
--- a/src/generated/player.ts
+++ b/src/generated/player.ts
@@ -11,10 +11,17 @@ export interface Player {
 }
 
 export interface PlayerProfile {
+  "identities"?: PlayerProfileIdentity[];
   "player"?: Player;
   "wallets"?: Wallet[];
 }
 
+export interface PlayerProfileIdentity {
+  "createdAt": string;
+  "provider": string;
+  "subject": string;
+}
+
 export interface Wallet {
   "balance"?: number;
   "currency"?: string;
diff --git a/src/index.ts b/src/index.ts
index 917f12e..4b8654b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -22,8 +22,11 @@ export type {
   AuthService,
   AuthState,
   AuthStateListener,
+  LinkWithCustomOptions,
+  LoginWithAppleOptions,
   LoginWithCustomOptions,
   LoginWithDeviceOptions,
+  LoginWithGoogleOptions,
 } from './auth/AuthService.js';
 export type { LeaderboardsService, LeaderboardHandle } from './leaderboards/LeaderboardsService.js';
 export type { BattlePassService } from './battlepass/BattlePassService.js';
@@ -71,7 +74,7 @@ export type {
 
 // Generated wire types — the shapes returned by the observable state and
 // handles, so consumers can name them instead of re-declaring mirrors.
-export type { Player, PlayerProfile, Wallet } from './generated/player.js';
+export type { Player, PlayerProfile, PlayerProfileIdentity, Wallet } from './generated/player.js';
 export type { CatalogItem } from './generated/catalog.js';
 export type { PlayerInventoryItem } from './generated/inventory.js';
 export type {