diff --git a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadDesignViewModel.cs b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadDesignViewModel.cs
index 1545adf44a..e7229900c6 100644
--- a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadDesignViewModel.cs
+++ b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadDesignViewModel.cs
@@ -11,8 +11,7 @@ namespace NexusMods.App.UI.Pages.CollectionDownload;
 
 public class CollectionDownloadDesignViewModel : APageViewModel<ICollectionDownloadViewModel>, ICollectionDownloadViewModel
 {
-    public CollectionDownloadTreeDataGridAdapter RequiredDownloadsAdapter { get; } = null!;
-    public CollectionDownloadTreeDataGridAdapter OptionalDownloadsAdapter { get; } = null!;
+    public CollectionDownloadTreeDataGridAdapter TreeDataGridAdapter { get; } = null!;
 
     public CollectionDownloadDesignViewModel() : base(new DesignWindowManager()) { }
 
diff --git a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml
index 6f3fc347e2..5fe8c45653 100644
--- a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml
+++ b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml
@@ -48,28 +48,29 @@
         </MenuFlyout>
     </reactiveUi:ReactiveUserControl.Resources>
 
-    <StackPanel x:Name="Body">
-        
+    <DockPanel x:Name="Body">
+
         <!-- first row (header) -->
-        <Border x:Name="HeaderBorderBackground">
+        <Border x:Name="HeaderBorderBackground" DockPanel.Dock="Top">
             <Border x:Name="HeaderBorder">
-                
+
                 <StackPanel x:Name="Header">
-                    
+
                     <!-- first header row (image and metadata) -->
                     <Border x:Name="MainContentBorder">
-                        <Grid x:Name="MainContent" ColumnDefinitions="Auto, *" >
-                            
+                        <Grid x:Name="MainContent" ColumnDefinitions="Auto, *">
+
                             <!-- left column (image) -->
                             <Border Grid.Column="0" x:Name="CollectionImageBorder">
                                 <Image x:Name="CollectionImage" />
                             </Border>
 
                             <!-- right column (metadata) -->
-                            <Grid Grid.Column="1" x:Name="CollectionDetails" RowDefinitions="Auto,Auto,Auto,*" ColumnDefinitions="Auto">
+                            <Grid Grid.Column="1" x:Name="CollectionDetails" RowDefinitions="Auto,Auto,Auto,*"
+                                  ColumnDefinitions="Auto">
                                 <TextBlock Grid.Row="0" x:Name="Title">COLLECTION DOWNLOAD</TextBlock>
-                                <TextBlock Grid.Row="1"  x:Name="Heading" />
-                                <Border Grid.Row="2"  x:Name="TagsPanelBorder">
+                                <TextBlock Grid.Row="1" x:Name="Heading" />
+                                <Border Grid.Row="2" x:Name="TagsPanelBorder">
                                     <StackPanel x:Name="TagsPanel">
                                         <TextBlock x:Name="Revision" />
                                         <StackPanel x:Name="AuthorStackPanel">
@@ -80,7 +81,7 @@
                                         </StackPanel>
                                     </StackPanel>
                                 </Border>
-                                    <TextBlock Grid.Row="3"  x:Name="Summary" />
+                                <TextBlock Grid.Row="3" x:Name="Summary" />
                             </Grid>
 
                         </Grid>
@@ -106,7 +107,8 @@
                                 <TextBlock x:Name="TotalSize" />
                             </StackPanel>
                             <StackPanel x:Name="OverallRatingPanel">
-                                <icons:UnifiedIcon x:Name="OverallRatingIcon" Value="{x:Static icons:IconValues.CheckCircle}" />
+                                <icons:UnifiedIcon x:Name="OverallRatingIcon"
+                                                   Value="{x:Static icons:IconValues.CheckCircle}" />
                                 <TextBlock x:Name="OverallRating" />
                             </StackPanel>
                         </StackPanel>
@@ -116,18 +118,19 @@
         </Border>
 
         <!-- second row (buttons) -->
-        <Border x:Name="ListHeaderRowBorder">
+        <Border x:Name="ListHeaderRowBorder" DockPanel.Dock="Top">
             <panels:FlexPanel x:Name="ListHeaderRow">
-                <TextBlock x:Name="CollectionStatusText"/>
+                <TextBlock x:Name="CollectionStatusText" />
                 <controls:StandardButton x:Name="InstallButton" Text="Install" />
-                <controls:StandardButton x:Name="DownloadAllButton" Text="Download All"/>
-                <controls:StandardButton x:Name="FlyoutMenuButton"  Flyout="{StaticResource CollectionMenuFlyout}" Text="..."/>
+                <controls:StandardButton x:Name="DownloadAllButton" Text="Download All" />
+                <controls:StandardButton x:Name="FlyoutMenuButton" Flyout="{StaticResource CollectionMenuFlyout}"
+                                         Text="..." />
             </panels:FlexPanel>
         </Border>
 
         <!-- third row (tab control and datagrid) -->
         <TabControl x:Name="TabControl">
-            <TabItem>
+            <TabItem x:Name="RequiredTab">
                 <TabItem.Header>
                     <StackPanel x:Name="RequiredModsPanel" Orientation="Horizontal">
                         <TextBlock>Required</TextBlock>
@@ -136,10 +139,9 @@
                         </Border>
                     </StackPanel>
                 </TabItem.Header>
-
                 <TreeDataGrid x:Name="RequiredDownloadsTree" />
             </TabItem>
-            <TabItem>
+            <TabItem x:Name="OptionalTab">
                 <TabItem.Header>
                     <StackPanel x:Name="OptionalModsPanel" Orientation="Horizontal">
                         <TextBlock>Optional</TextBlock>
@@ -151,7 +153,6 @@
                 <TreeDataGrid x:Name="OptionalDownloadsTree" />
             </TabItem>
         </TabControl>
-
-    </StackPanel>
+    </DockPanel>
 
 </reactiveUi:ReactiveUserControl>
diff --git a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml.cs b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml.cs
index 6689461da3..3c2a907b11 100644
--- a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml.cs
+++ b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadView.axaml.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using Avalonia.Media;
@@ -15,18 +16,18 @@ public CollectionDownloadView()
     {
         InitializeComponent();
 
-        TreeDataGridViewHelper.SetupTreeDataGridAdapter<CollectionDownloadView, ICollectionDownloadViewModel, ILibraryItemModel, EntityId>(this, RequiredDownloadsTree, vm => vm.RequiredDownloadsAdapter);
-        TreeDataGridViewHelper.SetupTreeDataGridAdapter<CollectionDownloadView, ICollectionDownloadViewModel, ILibraryItemModel, EntityId>(this, OptionalDownloadsTree, vm => vm.OptionalDownloadsAdapter);
+        TreeDataGridViewHelper.SetupTreeDataGridAdapter<CollectionDownloadView, ICollectionDownloadViewModel, ILibraryItemModel, EntityId>(this, RequiredDownloadsTree, vm => vm.TreeDataGridAdapter);
+        TreeDataGridViewHelper.SetupTreeDataGridAdapter<CollectionDownloadView, ICollectionDownloadViewModel, ILibraryItemModel, EntityId>(this, OptionalDownloadsTree, vm => vm.TreeDataGridAdapter);
 
         this.WhenActivated(d =>
         {
             this.BindCommand(ViewModel, vm => vm.DownloadAllCommand, view => view.DownloadAllButton)
                 .DisposeWith(d);
 
-            this.OneWayBind(ViewModel, vm => vm.RequiredDownloadsAdapter.Source.Value, view => view.RequiredDownloadsTree.Source)
+            this.OneWayBind(ViewModel, vm => vm.TreeDataGridAdapter.Source.Value, view => view.RequiredDownloadsTree.Source)
                 .DisposeWith(d);
 
-            this.OneWayBind(ViewModel, vm => vm.OptionalDownloadsAdapter.Source.Value, view => view.OptionalDownloadsTree.Source)
+            this.OneWayBind(ViewModel, vm => vm.TreeDataGridAdapter.Source.Value, view => view.OptionalDownloadsTree.Source)
                 .DisposeWith(d);
 
              this.WhenAnyValue(view => view.ViewModel!.BackgroundImage)
@@ -78,14 +79,28 @@ public CollectionDownloadView()
             this.OneWayBind(ViewModel, vm => vm.RevisionNumber, view => view.Revision.Text, revision => $"Revision {revision}")
                 .DisposeWith(d);
 
+            this.WhenAnyValue(view => view.TabControl.SelectedItem)
+                .Select(selectedItem =>
+                {
+                    if (ReferenceEquals(selectedItem, RequiredTab)) return CollectionDownloadsFilter.OnlyRequired;
+                    if (ReferenceEquals(selectedItem, OptionalTab)) return CollectionDownloadsFilter.OnlyOptional;
+                    throw new UnreachableException();
+                })
+                .Subscribe(filter =>
+                {
+                    ViewModel!.TreeDataGridAdapter.Filter.Value = filter;
+                })
+                .DisposeWith(d);
+
             this.WhenAnyValue(view => view.ViewModel)
                 .WhereNotNull()
-                .Subscribe(vm =>
+                .Select(static vm => vm.OptionalDownloadsCount > 0)
+                .Subscribe(hasOptionalDownloads =>
                 {
-                    if (vm.OptionalDownloadsCount == 0)
-                    {
-                        // TabControl.IsVisible = false;
-                    }
+                    if (hasOptionalDownloads) TabControl.Classes.Remove("SingleTab");
+                    else TabControl.Classes.Add("SingleTab");
+
+                    if (!hasOptionalDownloads) TabControl.SelectedItem = RequiredTab;
                 }).DisposeWith(d);
 
             this.WhenAnyValue(view => view.ViewModel!.OverallRating)
diff --git a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadViewModel.cs b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadViewModel.cs
index e8583c34ca..9c3cb7ed1b 100644
--- a/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadViewModel.cs
+++ b/src/NexusMods.App.UI/Pages/CollectionDownload/CollectionDownloadViewModel.cs
@@ -1,4 +1,5 @@
 using System.Diagnostics;
+using System.Reactive.Linq;
 using Avalonia.Controls.Models.TreeDataGrid;
 using Avalonia.Media.Imaging;
 using DynamicData;
@@ -20,7 +21,6 @@
 using R3;
 using ReactiveUI;
 using ReactiveUI.Fody.Helpers;
-using ReactiveCommand = R3.ReactiveCommand;
 
 namespace NexusMods.App.UI.Pages.CollectionDownload;
 
@@ -34,9 +34,7 @@ public class CollectionDownloadViewModel : APageViewModel<ICollectionDownloadVie
     private readonly NexusModsDataProvider _nexusModsDataProvider;
     private readonly CollectionDownloader _collectionDownloader;
 
-    public CollectionDownloadTreeDataGridAdapter RequiredDownloadsAdapter { get; }
-
-    public CollectionDownloadTreeDataGridAdapter OptionalDownloadsAdapter { get; }
+    public CollectionDownloadTreeDataGridAdapter TreeDataGridAdapter { get; }
 
     public CollectionDownloadViewModel(
         IWindowManager windowManager,
@@ -58,10 +56,8 @@ public CollectionDownloadViewModel(
         TabTitle = _collection.Name;
         TabIcon = IconValues.Collections;
 
-        RequiredDownloadsAdapter = new CollectionDownloadTreeDataGridAdapter(_nexusModsDataProvider, revisionMetadata);
-        RequiredDownloadsAdapter.ViewHierarchical.Value = false;
-        OptionalDownloadsAdapter = new CollectionDownloadTreeDataGridAdapter(_nexusModsDataProvider, revisionMetadata);
-        OptionalDownloadsAdapter.ViewHierarchical.Value = false;
+        TreeDataGridAdapter = new CollectionDownloadTreeDataGridAdapter(_nexusModsDataProvider, revisionMetadata);
+        TreeDataGridAdapter.ViewHierarchical.Value = false;
 
         // TODO:
         CollectionStatusText = "TODO";
@@ -86,14 +82,12 @@ public CollectionDownloadViewModel(
             configureAwait: false
         );
 
-        InstallCollectionCommand = new ReactiveCommand<Unit>(canExecuteSource: Observable.Return(false), initialCanExecute: false);
+        InstallCollectionCommand = new ReactiveCommand<Unit>(canExecuteSource: R3.Observable.Return(false), initialCanExecute: false);
 
         this.WhenActivated(disposables =>
         {
-            RequiredDownloadsAdapter.Activate();
-            OptionalDownloadsAdapter.Activate();
-            Disposable.Create(RequiredDownloadsAdapter, static adapter => adapter.Deactivate());
-            Disposable.Create(OptionalDownloadsAdapter, static adapter => adapter.Deactivate());
+            TreeDataGridAdapter.Activate();
+            Disposable.Create(TreeDataGridAdapter, static adapter => adapter.Deactivate());
 
             ImagePipelines.CreateObservable(_collection.Id, tileImagePipeline)
                 .ObserveOnUIThreadDispatcher()
@@ -110,7 +104,7 @@ public CollectionDownloadViewModel(
                 .Subscribe(this, static (bitmap, self) => self.AuthorAvatar = bitmap)
                 .AddTo(disposables);
 
-            RequiredDownloadsAdapter.MessageSubject.Merge(OptionalDownloadsAdapter.MessageSubject).SubscribeAwait(
+            TreeDataGridAdapter.MessageSubject.SubscribeAwait(
                 onNextAsync: (message, cancellationToken) =>
                 {
                     return message.Item.Match(
@@ -158,11 +152,14 @@ public class CollectionDownloadTreeDataGridAdapter : TreeDataGridAdapter<ILibrar
     private readonly CollectionRevisionMetadata.ReadOnly _revisionMetadata;
 
     public Subject<DownloadMessage> MessageSubject { get; } = new();
+    public R3.ReactiveProperty<CollectionDownloadsFilter> Filter { get; } = new(value: CollectionDownloadsFilter.OnlyRequired);
 
     private readonly Dictionary<ILibraryItemModel, IDisposable> _commandDisposables = new();
     private readonly IDisposable _activationDisposable;
 
-    public CollectionDownloadTreeDataGridAdapter(NexusModsDataProvider nexusModsDataProvider, CollectionRevisionMetadata.ReadOnly revisionMetadata)
+    public CollectionDownloadTreeDataGridAdapter(
+        NexusModsDataProvider nexusModsDataProvider,
+        CollectionRevisionMetadata.ReadOnly revisionMetadata)
     {
         _nexusModsDataProvider = nexusModsDataProvider;
         _revisionMetadata = revisionMetadata;
@@ -213,7 +210,7 @@ protected override void BeforeModelDeactivationHook(ILibraryItemModel model)
 
     protected override IObservable<IChangeSet<ILibraryItemModel, EntityId>> GetRootsObservable(bool viewHierarchical)
     {
-        return _nexusModsDataProvider.ObserveCollectionItems(_revisionMetadata);
+        return _nexusModsDataProvider.ObserveCollectionItems(_revisionMetadata, Filter.AsSystemObservable());
     }
 
     protected override IColumn<ILibraryItemModel>[] CreateColumns(bool viewHierarchical)
diff --git a/src/NexusMods.App.UI/Pages/CollectionDownload/ICollectionDownloadViewModel.cs b/src/NexusMods.App.UI/Pages/CollectionDownload/ICollectionDownloadViewModel.cs
index 10310b0d52..65d8291741 100644
--- a/src/NexusMods.App.UI/Pages/CollectionDownload/ICollectionDownloadViewModel.cs
+++ b/src/NexusMods.App.UI/Pages/CollectionDownload/ICollectionDownloadViewModel.cs
@@ -9,8 +9,7 @@ namespace NexusMods.App.UI.Pages.CollectionDownload;
 
 public interface ICollectionDownloadViewModel : IPageViewModelInterface
 {
-    CollectionDownloadTreeDataGridAdapter RequiredDownloadsAdapter { get; }
-    CollectionDownloadTreeDataGridAdapter OptionalDownloadsAdapter { get; }
+    CollectionDownloadTreeDataGridAdapter TreeDataGridAdapter { get; }
 
     /// <inheritdoc cref="CollectionMetadata.Name"/>
     string Name { get; }
diff --git a/src/NexusMods.App.UI/Pages/LibraryPage/ILibraryItemWithAction.cs b/src/NexusMods.App.UI/Pages/LibraryPage/ILibraryItemWithAction.cs
index 2ac76d28de..a4f5719e3a 100644
--- a/src/NexusMods.App.UI/Pages/LibraryPage/ILibraryItemWithAction.cs
+++ b/src/NexusMods.App.UI/Pages/LibraryPage/ILibraryItemWithAction.cs
@@ -18,6 +18,8 @@ int IComparable<ILibraryItemWithAction>.CompareTo(ILibraryItemWithAction? other)
         {
             (ILibraryItemWithInstallAction, ILibraryItemWithDownloadAction) => -1,
             (ILibraryItemWithDownloadAction, ILibraryItemWithInstallAction) => 1,
+            (ILibraryItemWithDownloadAction a, ILibraryItemWithDownloadAction b) => ((int)a.DownloadState.Value).CompareTo((int)b.DownloadState.Value),
+            (ILibraryItemWithInstallAction a, ILibraryItemWithInstallAction b) => a.IsInstalled.Value.CompareTo(b.IsInstalled.Value),
             _ => 0,
         };
     }
diff --git a/src/NexusMods.App.UI/Pages/NexusModsDataProvider.cs b/src/NexusMods.App.UI/Pages/NexusModsDataProvider.cs
index 4686b09501..15093887b7 100644
--- a/src/NexusMods.App.UI/Pages/NexusModsDataProvider.cs
+++ b/src/NexusMods.App.UI/Pages/NexusModsDataProvider.cs
@@ -25,6 +25,12 @@
 namespace NexusMods.App.UI.Pages;
 using CollectionDownloadEntity = Abstractions.NexusModsLibrary.Models.CollectionDownload;
 
+public enum CollectionDownloadsFilter
+{
+    OnlyRequired,
+    OnlyOptional,
+}
+
 [UsedImplicitly]
 public class NexusModsDataProvider : ILibraryDataProvider, ILoadoutDataProvider
 {
@@ -38,13 +44,19 @@ public NexusModsDataProvider(IServiceProvider serviceProvider)
     }
 
     public IObservable<IChangeSet<ILibraryItemModel, EntityId>> ObserveCollectionItems(
-        CollectionRevisionMetadata.ReadOnly revisionMetadata)
+        CollectionRevisionMetadata.ReadOnly revisionMetadata,
+        IObservable<CollectionDownloadsFilter> filterObservable)
     {
         return _connection
             .ObserveDatoms(CollectionDownloadEntity.CollectionRevision, revisionMetadata)
             .AsEntityIds()
             .Transform(datom => CollectionDownloadEntity.Load(_connection.Db, datom.E))
-            .Filter(static downloadEntity => downloadEntity.IsCollectionDownloadNexusMods() || downloadEntity.IsCollectionDownloadExternal())
+            .FilterOnObservable(downloadEntity => filterObservable.Select(filter => filter switch
+            {
+                CollectionDownloadsFilter.OnlyRequired => !downloadEntity.IsOptional,
+                CollectionDownloadsFilter.OnlyOptional => downloadEntity.IsOptional,
+            }))
+            .FilterImmutable(static downloadEntity => downloadEntity.IsCollectionDownloadNexusMods() || downloadEntity.IsCollectionDownloadExternal())
             .Transform(ILibraryItemModel (downloadEntity) =>
             {
                 if (downloadEntity.TryGetAsCollectionDownloadNexusMods(out var nexusModsDownload))
diff --git a/src/Themes/NexusMods.Themes.NexusFluentDark/Styles/UserControls/CollectionDownloadPage/CollectionDownloadPageStyles.axaml b/src/Themes/NexusMods.Themes.NexusFluentDark/Styles/UserControls/CollectionDownloadPage/CollectionDownloadPageStyles.axaml
index 60d41fbf2e..6be6b3e25c 100644
--- a/src/Themes/NexusMods.Themes.NexusFluentDark/Styles/UserControls/CollectionDownloadPage/CollectionDownloadPageStyles.axaml
+++ b/src/Themes/NexusMods.Themes.NexusFluentDark/Styles/UserControls/CollectionDownloadPage/CollectionDownloadPageStyles.axaml
@@ -3,8 +3,9 @@
         xmlns:panels="clr-namespace:Avalonia.Labs.Panels;assembly=Avalonia.Labs.Panels"
         xmlns:collections="clr-namespace:NexusMods.App.UI.Pages.CollectionDownload;assembly=NexusMods.App.UI"
         xmlns:icons="clr-namespace:NexusMods.Icons;assembly=NexusMods.Icons">
+    
     <Design.PreviewWith>
-        <Border Width="500" Height="500">
+        <Border Width="800" Height="500">
             <Border.Resources>
                 <collections:CollectionDownloadDesignViewModel x:Key="CollectionDownloadPageDesignViewModel" />
             </Border.Resources>
@@ -21,27 +22,19 @@
             </LinearGradientBrush>
         </Style.Resources>
 
-        <Style Selector="^ StackPanel#Body">
-            <Setter Property="Orientation" Value="Vertical" />
-
+        <Style Selector="^ DockPanel#Body">
             <Style Selector="^ Border#HeaderBorderBackground">
-
                 <Style Selector="^ Border#HeaderBorder">
-                    <!-- <Setter Property="MaxWidth" Value="628" /> -->
                     <Setter Property="HorizontalAlignment" Value="Stretch" />
                     <Setter Property="Padding" Value="24,24,24,16" />
                     <Setter Property="Background" Value="{StaticResource HeaderImageLinearGradientBrush}" />
-
-
-                    <Style Selector="^ StackPanel#Header">
-                        <!-- -->
-                        <!-- <Setter Property="HorizontalAlignment" Value="Left"/> -->
-
-                        <!-- NOTE(insomnious): Some weird stuff happening here with max width and backgrounds. Layout wise
+                    
+                    <!-- NOTE(insomnious): Some weird stuff happening here with max width and backgrounds. Layout wise
                     it's working, as things are aligned correctly, but the background is not being applied correctly. 
                     After chatting with @Al12rs, we are leaving this for now as we can't fully test this (yet) and we
                     don't want to add extra layout code for no reason -->
-
+                    
+                    <Style Selector="^ StackPanel#Header">
                         <Style Selector="^ Border#MainContentBorder">
                             <!-- <Setter Property="Background" Value="DarkGoldenrod" /> -->
                             <Setter Property="Padding" Value="0, 0, 0, 24" />
@@ -133,7 +126,7 @@
                                                 Value="{StaticResource NeutralTranslucentSubduedBrush}" />
                                         <Setter Property="TextWrapping" Value="Wrap" />
                                         <Setter Property="TextTrimming" Value="CharacterEllipsis" />
-                                        </Style>
+                                    </Style>
 
                                 </Style>
 
@@ -227,6 +220,13 @@
                 <Setter Property="panels:Flex.AlignSelf" Value="Stretch" />
                 <Setter Property="Padding" Value="0" />
             </Style>
+
+            <!-- NOTE(erri120): Hide the tab strip when there's only one tab -->
+            <Style Selector="^ TabControl.SingleTab">
+                <Style Selector="^ /template/ ItemsPresenter#PART_ItemsPresenter">
+                    <Setter Property="IsVisible" Value="False"/>
+                </Style>
+            </Style>
         </Style>
     </Style>
 </Styles>