diff --git a/src/admin/admin.controller.ts b/src/admin/admin.controller.ts
index dc5e9ba..49ec1f0 100644
--- a/src/admin/admin.controller.ts
+++ b/src/admin/admin.controller.ts
@@ -130,4 +130,10 @@ export class AdminController {
   ): Promise<void> {
     return this._adminService.broadcastNotification(uuid, notification);
   }
+
+  @UseGuards(AuthGuard)
+  @Delete('completionists')
+  public clearCompletionists(@UserDecorator('id') uuid: string): Promise<void> {
+    return this._adminService.clearCompletionists(uuid);
+  }
 }
diff --git a/src/admin/admin.service.ts b/src/admin/admin.service.ts
index d03eee2..0ec8981 100644
--- a/src/admin/admin.service.ts
+++ b/src/admin/admin.service.ts
@@ -520,4 +520,27 @@ export class AdminService {
 
     return;
   }
+
+  public async clearCompletionists(uuid: string) {
+    const requestingUser = await this._userRepository.findOne(uuid, {
+      relations: ['roles'],
+    });
+
+    if (!this._hasPermission(requestingUser.roles, PERMISSION.ADMIN)) {
+      throw new HttpException('Permission denied.', HttpStatus.FORBIDDEN);
+    }
+
+    const users = await this._userRepository.find({
+      relations: ['badges'],
+    });
+
+    for (const user of users) {
+      if (user.badges.some((badge) => badge.id.startsWith('completionist'))) {
+        user.badges = user.badges.filter(
+          (badge) => !badge.id.startsWith('completionist'),
+        );
+        await this._userRepository.save(user);
+      }
+    }
+  }
 }