diff --git a/src/Koogle.Application/Games/ChristmasTree/ChristmasTreeGameLogicService.cs b/src/Koogle.Application/Games/ChristmasTree/ChristmasTreeGameLogicService.cs
index 6a30f34..50dd8d5 100644
--- a/src/Koogle.Application/Games/ChristmasTree/ChristmasTreeGameLogicService.cs
+++ b/src/Koogle.Application/Games/ChristmasTree/ChristmasTreeGameLogicService.cs
@@ -453,7 +453,21 @@ public class ChristmasTreeGameLogicService : IGameLogicService
                             Icon = "TouchApp",
                             Color = "Primary",
                             Tooltip = $"Wähle eine Zahl zum Streichen: {string.Join(", ", availableNumbers)}",
-                            Order = 1
+                            Order = 1,
+                            Parameters =
+                            [
+                                new ActionParameterDefinition
+                                {
+                                    Key = "number",
+                                    Label = "Wähle eine Zahl",
+                                    Type = "select",
+                                    Options = availableNumbers.Select(n => new ActionParameterOption
+                                    {
+                                        Value = n,
+                                        Label = n.ToString()
+                                    }).ToList()
+                                }
+                            ]
                         }
                     ];
                 }
diff --git a/src/Koogle.Application/Games/GameActionTypes.cs b/src/Koogle.Application/Games/GameActionTypes.cs
index 4f1170e..74c5596 100644
--- a/src/Koogle.Application/Games/GameActionTypes.cs
+++ b/src/Koogle.Application/Games/GameActionTypes.cs
@@ -39,6 +39,53 @@ public record GameActionDescriptor
     /// Display order for sorting (lower = first).
     /// </summary>
     public int Order { get; init; } = 100;
+
+    /// <summary>
+    /// Parameter definitions if action requires user input.
+    /// </summary>
+    public IReadOnlyList<ActionParameterDefinition>? Parameters { get; init; }
+}
+
+/// <summary>
+/// Defines a parameter that must be collected from the user before executing an action.
+/// </summary>
+public record ActionParameterDefinition
+{
+    /// <summary>
+    /// Parameter key (used in the parameters dictionary).
+    /// </summary>
+    public required string Key { get; init; }
+
+    /// <summary>
+    /// Display label for the parameter.
+    /// </summary>
+    public required string Label { get; init; }
+
+    /// <summary>
+    /// Parameter type: "select" for dropdown, "number" for numeric input.
+    /// </summary>
+    public string Type { get; init; } = "select";
+
+    /// <summary>
+    /// Available options for "select" type.
+    /// </summary>
+    public IReadOnlyList<ActionParameterOption>? Options { get; init; }
+}
+
+/// <summary>
+/// An option for a select-type parameter.
+/// </summary>
+public record ActionParameterOption
+{
+    /// <summary>
+    /// The value to use when this option is selected.
+    /// </summary>
+    public required object Value { get; init; }
+
+    /// <summary>
+    /// Display label for the option.
+    /// </summary>
+    public required string Label { get; init; }
 }
 
 /// <summary>
diff --git a/src/Koogle.Web/Components/Game/GameActionPanel.razor b/src/Koogle.Web/Components/Game/GameActionPanel.razor
index 6dfaa22..7e2424e 100644
--- a/src/Koogle.Web/Components/Game/GameActionPanel.razor
+++ b/src/Koogle.Web/Components/Game/GameActionPanel.razor
@@ -17,7 +17,7 @@
                        Color="@GetColor(action.Color)"
                        StartIcon="@GetIcon(action.Icon)"
                        Disabled="@(!action.IsEnabled || GameState.Value.IsSaving || GameState.Value.IsLoading)"
-                       OnClick="@(() => ExecuteAction(action.ActionId))"
+                       OnClick="@(() => OnActionClick(action))"
                        Title="@action.Tooltip"
                        Class="game-action-button">
                 @action.Label
@@ -26,6 +26,40 @@
     </div>
 }
 
+<MudDialog @bind-Visible="_dialogVisible" Options="_dialogOptions">
+    <TitleContent>
+        <MudText Typo="Typo.h6">@_currentAction?.Label</MudText>
+    </TitleContent>
+    <DialogContent>
+        @if (_currentAction?.Parameters != null)
+        {
+            @foreach (var param in _currentAction.Parameters)
+            {
+                @if (param.Type == "select" && param.Options != null)
+                {
+                    <div class="parameter-select">
+                        <MudText Typo="Typo.subtitle2" Class="mb-2">@param.Label</MudText>
+                        <div class="d-flex flex-wrap gap-2">
+                            @foreach (var option in param.Options)
+                            {
+                                <MudButton Variant="Variant.Outlined"
+                                           Color="Color.Primary"
+                                           OnClick="@(() => SelectOption(param.Key, option.Value))"
+                                           Class="parameter-option-button">
+                                    @option.Label
+                                </MudButton>
+                            }
+                        </div>
+                    </div>
+                }
+            }
+        }
+    </DialogContent>
+    <DialogActions>
+        <MudButton OnClick="CloseDialog">Abbrechen</MudButton>
+    </DialogActions>
+</MudDialog>
+
 <style>
     .game-action-panel {
         display: flex;
@@ -40,10 +74,21 @@
     .game-action-button {
         min-width: 120px;
     }
+
+    .parameter-select {
+        margin-bottom: 16px;
+    }
+
+    .parameter-option-button {
+        min-width: 60px;
+    }
 </style>
 
 @code {
     private IReadOnlyList<GameActionDescriptor> _availableActions = [];
+    private bool _dialogVisible;
+    private GameActionDescriptor? _currentAction;
+    private readonly DialogOptions _dialogOptions = new() { CloseOnEscapeKey = true, MaxWidth = MaxWidth.Small };
 
     protected override void OnInitialized()
     {
@@ -81,9 +126,32 @@
         }
     }
 
-    private void ExecuteAction(string actionId)
+    private void OnActionClick(GameActionDescriptor action)
     {
-        Dispatcher.Dispatch(new ExecuteGameActionAction(actionId));
+        if (action.Parameters is { Count: > 0 })
+        {
+            _currentAction = action;
+            _dialogVisible = true;
+        }
+        else
+        {
+            Dispatcher.Dispatch(new ExecuteGameActionAction(action.ActionId));
+        }
+    }
+
+    private void SelectOption(string paramKey, object value)
+    {
+        if (_currentAction == null) return;
+
+        var parameters = new Dictionary<string, object> { [paramKey] = value };
+        Dispatcher.Dispatch(new ExecuteGameActionAction(_currentAction.ActionId, parameters));
+        CloseDialog();
+    }
+
+    private void CloseDialog()
+    {
+        _dialogVisible = false;
+        _currentAction = null;
     }
 
     private static Color GetColor(string colorName) => colorName switch