diff --git a/app/assets/javascripts/discourse/controllers/group-activity-topics.js.es6 b/app/assets/javascripts/discourse/controllers/group-activity-topics.js.es6
new file mode 100644
index 00000000000..e538cb9c77f
--- /dev/null
+++ b/app/assets/javascripts/discourse/controllers/group-activity-topics.js.es6
@@ -0,0 +1,7 @@
+export default Ember.Controller.extend({
+  actions: {
+    loadMore() {
+      this.get('model').loadMore();
+    }
+  }
+});
diff --git a/app/assets/javascripts/discourse/routes/group-activity-topics.js.es6 b/app/assets/javascripts/discourse/routes/group-activity-topics.js.es6
index 16164a51bb3..5310f0cad65 100644
--- a/app/assets/javascripts/discourse/routes/group-activity-topics.js.es6
+++ b/app/assets/javascripts/discourse/routes/group-activity-topics.js.es6
@@ -1,3 +1,11 @@
-import { buildGroupPage } from 'discourse/routes/group-activity-posts';
+export default Discourse.Route.extend({
+  titleToken() {
+    return I18n.t(`groups.topics`);
+  },
 
-export default buildGroupPage('topics');
+  model() {
+    return this.store.findFiltered("topicList", {
+      filter: `topics/groups/${this.modelFor('group').get('name')}`
+    });
+  }
+});
diff --git a/app/assets/javascripts/discourse/templates/group-activity-topics.hbs b/app/assets/javascripts/discourse/templates/group-activity-topics.hbs
new file mode 100644
index 00000000000..7e87f59d094
--- /dev/null
+++ b/app/assets/javascripts/discourse/templates/group-activity-topics.hbs
@@ -0,0 +1,5 @@
+{{#load-more class="paginated-topics-list" selector=".paginated-topics-list .topic-list tr" action="loadMore"}}
+  {{basic-topic-list topicList=model
+                     showPosters=true}}
+  {{conditional-loading-spinner condition=model.loadingMore}}
+{{/load-more}}
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index 7ba55917fee..f4881391381 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -101,15 +101,6 @@ class GroupsController < ApplicationController
     render 'posts/latest', formats: [:rss]
   end
 
-  def topics
-    group = find_group(:group_id)
-    posts = group.posts_for(
-      guardian,
-      params.permit(:before_post_id, :category_id)
-    ).where(post_number: 1).limit(20)
-    render_serialized posts.to_a, GroupPostSerializer
-  end
-
   def mentions
     raise Discourse::NotFound unless SiteSetting.enable_mentions?
     group = find_group(:group_id)
diff --git a/app/controllers/list_controller.rb b/app/controllers/list_controller.rb
index ba7946b1d32..e267de7bd8a 100644
--- a/app/controllers/list_controller.rb
+++ b/app/controllers/list_controller.rb
@@ -50,6 +50,7 @@ class ListController < ApplicationController
     TopTopic.periods.map { |p| :"category_top_#{p}" },
     TopTopic.periods.map { |p| :"category_none_top_#{p}" },
     TopTopic.periods.map { |p| :"parent_category_category_top_#{p}" },
+    :group_topics
   ].flatten
 
   # Create our filters
@@ -131,6 +132,18 @@ class ListController < ApplicationController
     respond_with_list(list)
   end
 
+  def group_topics
+    group = Group.find_by(name: params[:group_name])
+    raise Discourse::NotFound unless group
+    guardian.ensure_can_see_group!(group)
+
+    list_opts = build_topic_list_options
+    list = generate_list_for("group_topics", group, list_opts)
+    list.more_topics_url = url_for(construct_url_with(:next, list_opts))
+    list.prev_topics_url = url_for(construct_url_with(:prev, list_opts))
+    respond_with_list(list)
+  end
+
   def self.generate_message_route(action)
     define_method("#{action}") do
       list_opts = build_topic_list_options
diff --git a/config/routes.rb b/config/routes.rb
index e02bd44f2b5..bc091d4a9f5 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -455,7 +455,6 @@ Discourse::Application.routes.draw do
 
     get 'members'
     get 'posts'
-    get 'topics'
     get 'mentions'
     get 'messages'
     get 'counts'
@@ -608,6 +607,7 @@ Discourse::Application.routes.draw do
     get "private-messages-archive/:username" => "list#private_messages_archive", as: "topics_private_messages_archive"
     get "private-messages-unread/:username" => "list#private_messages_unread", as: "topics_private_messages_unread"
     get "private-messages-tags/:username/:tag_id.json" => "list#private_messages_tag", as: "topics_private_messages_tag", constraints: StaffConstraint.new
+    get "groups/:group_name.json" => "list#group_topics", as: "group_topics"
 
     scope "/private-messages-group/:username", group_name: RouteFormat.username do
       get ":group_name.json" => "list#private_messages_group", as: "topics_private_messages_group"
diff --git a/lib/topic_query.rb b/lib/topic_query.rb
index ee65210573e..35311ba0a85 100644
--- a/lib/topic_query.rb
+++ b/lib/topic_query.rb
@@ -220,6 +220,16 @@ class TopicQuery
       .where('um.user_id IS NULL')
   end
 
+  def list_group_topics(group)
+    list = default_results.where("
+      topics.user_id IN (
+        SELECT user_id FROM group_users gu WHERE gu.group_id = #{group.id.to_i}
+      )
+    ")
+
+    create_list(:group_topics, {}, list)
+  end
+
   def list_private_messages(user)
     list = private_messages_for(user, :user)
 
diff --git a/spec/components/topic_query_spec.rb b/spec/components/topic_query_spec.rb
index 47bf9f4c23c..98f162f77b9 100644
--- a/spec/components/topic_query_spec.rb
+++ b/spec/components/topic_query_spec.rb
@@ -885,10 +885,49 @@ describe TopicQuery do
           expect(suggested_topics[1, 3]).to include(closed_topic.id)
           expect(suggested_topics[1, 3]).to include(archived_topic.id)
         end
-
       end
     end
-
   end
 
+  describe '#list_group_topics' do
+    let(:group) { Fabricate(:group) }
+
+    let(:user) do
+      user = Fabricate(:user)
+      group.add(user)
+      user
+    end
+
+    let(:user2) do
+      user = Fabricate(:user)
+      group.add(user)
+      user
+    end
+
+    let(:private_category) do
+      Fabricate(:private_category, group: group)
+    end
+
+    let!(:private_message_topic) { Fabricate(:private_message_post, user: user).topic }
+    let!(:topic1) { Fabricate(:topic, user: user) }
+    let!(:topic2) { Fabricate(:topic, user: user, category: Fabricate(:category)) }
+    let!(:topic3) { Fabricate(:topic, user: user, category: private_category) }
+    let!(:topic4) { Fabricate(:topic) }
+    let!(:topic5) { Fabricate(:topic, user: user, visible: false) }
+    let!(:topic6) { Fabricate(:topic, user: user2) }
+
+    it 'should return the right list' do
+      topics = TopicQuery.new.list_group_topics(group).topics
+
+      expect(topics).to contain_exactly(topic1, topic2, topic6)
+
+      topics = TopicQuery.new(user).list_group_topics(group).topics
+
+      expect(topics).to contain_exactly(topic1, topic2, topic3, topic6)
+
+      topics = TopicQuery.new(user2).list_group_topics(group).topics
+
+      expect(topics).to contain_exactly(topic1, topic2, topic3, topic6)
+    end
+  end
 end
diff --git a/spec/requests/list_controller_spec.rb b/spec/requests/list_controller_spec.rb
index 9456e46fbff..f4862827deb 100644
--- a/spec/requests/list_controller_spec.rb
+++ b/spec/requests/list_controller_spec.rb
@@ -104,7 +104,84 @@ RSpec.describe ListController do
       [moderator, admin].each do |user|
         sign_in(user)
         get "/topics/private-messages-tags/#{user.username}/#{tag.name}.json"
-        expect(response).to be_success
+        expect(response.status).to eq(200)
+      end
+    end
+  end
+
+  describe '#group_topics' do
+    let(:group) { Fabricate(:group) }
+
+    %i{user user2}.each do |user|
+      let(user) do
+        user = Fabricate(:user)
+        group.add(user)
+        user
+      end
+    end
+
+    let!(:topic) { Fabricate(:topic, user: user) }
+    let!(:topic2) { Fabricate(:topic, user: user2) }
+    let!(:another_topic) { Fabricate(:topic) }
+
+    describe 'when an invalid group name is given' do
+      it 'should return the right response' do
+        get "/topics/groups/something.json"
+
+        expect(response.status).to eq(404)
+      end
+    end
+
+    describe 'for an anon user' do
+      describe 'public visible group' do
+        it 'should return the right response' do
+          get "/topics/groups/#{group.name}.json"
+
+          expect(response.status).to eq(200)
+          expect(JSON.parse(response.body)["topic_list"]).to be_present
+        end
+      end
+
+      describe 'restricted group' do
+        before { group.update!(visibility_level: Group.visibility_levels[:staff]) }
+
+        it 'should return the right response' do
+          get "/topics/groups/#{group.name}.json"
+
+          expect(response.status).to eq(403)
+        end
+      end
+    end
+
+    describe 'for a normal user' do
+      before { sign_in(Fabricate(:user)) }
+
+      describe 'restricted group' do
+        before { group.update!(visibility_level: Group.visibility_levels[:staff]) }
+
+        it 'should return the right response' do
+          get "/topics/groups/#{group.name}.json"
+
+          expect(response.status).to eq(403)
+        end
+      end
+    end
+
+    describe 'for a group user' do
+      before do
+        sign_in(user)
+      end
+
+      it 'should be able to view the topics started by group users' do
+        get "/topics/groups/#{group.name}.json"
+
+        expect(response.status).to eq(200)
+
+        topics = JSON.parse(response.body)["topic_list"]["topics"]
+
+        expect(topics.map { |topic| topic["id"] }).to contain_exactly(
+          topic.id, topic2.id
+        )
       end
     end
   end
diff --git a/test/javascripts/acceptance/groups-test.js.es6 b/test/javascripts/acceptance/groups-test.js.es6
index 4e098f31694..12298b6882e 100644
--- a/test/javascripts/acceptance/groups-test.js.es6
+++ b/test/javascripts/acceptance/groups-test.js.es6
@@ -60,7 +60,8 @@ QUnit.test("Anonymous Viewing Group", assert => {
   click(".group-activity-nav li a[href='/groups/discourse/activity/topics']");
 
   andThen(() => {
-    assert.ok(count('.group-post') > 0, "it lists stream items");
+    assert.ok(find('.topic-list'), "it shows the topic list");
+    assert.equal(count('.topic-list-item'), 2, "it lists stream items");
   });
 
   click(".group-activity-nav li a[href='/groups/discourse/activity/mentions']");
diff --git a/test/javascripts/fixtures/group-fixtures.js.es6 b/test/javascripts/fixtures/group-fixtures.js.es6
index 07cb5ef9f5f..27a4a6bbf15 100644
--- a/test/javascripts/fixtures/group-fixtures.js.es6
+++ b/test/javascripts/fixtures/group-fixtures.js.es6
@@ -16,6 +16,106 @@ export default {
       "messageable":true
     }
   },
+  "/topics/groups/discourse.json":{
+    "users":[
+      {
+        "id":2,
+        "username":"bruce1",
+        "avatar_template":"/letter_avatar_proxy/v2/letter/b/9de053/{size}.png"
+      },
+      {
+        "id":1,
+        "username":"bruce0",
+        "avatar_template":"/letter_avatar_proxy/v2/letter/b/90ced4/{size}.png"
+      }
+    ],
+    "primary_groups":[],
+    "topic_list":{
+      "can_create_topic":true,
+      "draft":null,
+      "draft_key":"new_topic",
+      "draft_sequence":1,
+      "per_page":30,
+      "topics":[
+        {
+          "id":12074,
+          "title":"This is a test topic 1",
+          "fancy_title":"This is a test topic 1",
+          "slug":"this-is-a-test-topic-1",
+          "posts_count":0,
+          "reply_count":0,
+          "highest_post_number":0,
+          "image_url":null,
+          "created_at":"2018-03-15T03:12:48.955Z",
+          "last_posted_at":null,
+          "bumped":true,
+          "bumped_at":"2018-03-15T03:12:48.955Z",
+          "unseen":true,
+          "pinned":false,
+          "unpinned":null,
+          "visible":true,
+          "closed":false,
+          "archived":false,
+          "bookmarked":null,
+          "liked":null,
+          "views":0,
+          "like_count":0,
+          "has_summary":false,
+          "archetype":"regular",
+          "last_poster_username":"bruce1",
+          "category_id":1,
+          "pinned_globally":false,
+          "featured_link":null,
+          "posters":[
+            {
+              "extras":"latest single",
+              "description":"Original Poster, Most Recent Poster",
+              "user_id":2,
+              "primary_group_id":null
+            }
+          ]
+        },
+        {
+          "id":12073,
+          "title":"This is a test topic 0",
+          "fancy_title":"This is a test topic 0",
+          "slug":"this-is-a-test-topic-0",
+          "posts_count":0,
+          "reply_count":0,
+          "highest_post_number":0,
+          "image_url":null,
+          "created_at":"2018-03-15T03:12:48.899Z",
+          "last_posted_at":null,
+          "bumped":true,
+          "bumped_at":"2018-03-15T03:12:48.900Z",
+          "unseen":true,
+          "pinned":false,
+          "unpinned":null,
+          "visible":true,
+          "closed":false,
+          "archived":false,
+          "bookmarked":null,
+          "liked":null,
+          "views":0,
+          "like_count":0,
+          "has_summary":false,
+          "archetype":"regular",
+          "last_poster_username":"bruce0",
+          "category_id":1,
+          "pinned_globally":false,
+          "featured_link":null,
+          "posters":[
+            {
+              "extras":"latest single",
+              "description":"Original Poster, Most Recent Poster",
+              "user_id":1,
+              "primary_group_id":null
+            }
+          ]
+        }
+      ]
+    }
+  },
   "/groups/discourse/counts.json":{
     "counts":{
       "posts":17829,
diff --git a/test/javascripts/helpers/create-pretender.js.es6 b/test/javascripts/helpers/create-pretender.js.es6
index 28e2607b21b..30d0e2a6ef7 100644
--- a/test/javascripts/helpers/create-pretender.js.es6
+++ b/test/javascripts/helpers/create-pretender.js.es6
@@ -295,8 +295,8 @@ export default function() {
       return response(200, []);
     });
 
-    this.get("/groups/discourse/topics.json", () => {
-      return response(200, fixturesByUrl['/groups/discourse/posts.json']);
+    this.get("/topics/groups/discourse.json", () => {
+      return response(200, fixturesByUrl['/topics/groups/discourse.json']);
     });
 
     this.get("/groups/discourse/mentions.json", () => {