src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/gameui/gameuicomponents/HighscoreViewController.java

@@ -0,0 +1,76 @@
+package ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.gameuicomponents;
+
+import ch.unibas.dmi.dbis.cs108.casono.client.network.LobbyClient;
+import java.util.List;
+import javafx.fxml.FXML;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListView;
+import javafx.stage.Stage;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+/** Controller for the highscore popup window. */
+public class HighscoreViewController {
+
+    private static final Logger LOGGER = LogManager.getLogger(HighscoreViewController.class);
+
+    @FXML private ListView<String> highscoreList;
+    @FXML private Label statusLabel;
+
+    private LobbyClient lobbyClient;
+
+    public void setLobbyClient(LobbyClient lobbyClient) {
+        this.lobbyClient = lobbyClient;
+    }
+
+    /** Loads current highscores from the server and refreshes the list. */
+    @FXML
+    public void refreshHighscores() {
+        if (highscoreList == null || statusLabel == null) {
+            return;
+        }
+
+        if (lobbyClient == null) {
+            statusLabel.setText("Lobby client not initialized.");
+            return;
+        }
+
+        try {
+            List<String> entries = lobbyClient.getHighscores();
+            highscoreList.getItems().setAll(entries);
+            statusLabel.setText(
+                    entries.isEmpty() ? "No highscores yet." : entries.size() + " entries loaded.");
+        } catch (RuntimeException e) {
+            LOGGER.error("Failed to load highscores: {}", e.getMessage());
+            statusLabel.setText("Failed to load highscores.");
+        }
+    }
+
+    /** Clears all highscores globally on the server and reloads the list. */
+    @FXML
+    public void clearHighscores() {
+        if (lobbyClient == null || statusLabel == null) {
+            return;
+        }
+
+        try {
+            lobbyClient.clearHighscores();
+            refreshHighscores();
+            statusLabel.setText("Highscores cleared.");
+        } catch (RuntimeException e) {
+            LOGGER.error("Failed to clear highscores: {}", e.getMessage());
+            statusLabel.setText("Failed to clear highscores.");
+        }
+    }
+
+    /** Closes the highscore popup window. */
+    @FXML
+    public void closeWindow() {
+        if (highscoreList == null || highscoreList.getScene() == null) {
+            return;
+        }
+
+        Stage stage = (Stage) highscoreList.getScene().getWindow();
+        stage.close();
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/gameui/gameuicomponents/TaskbarController.java

@@ -1,10 +1,12 @@
 package ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.gameuicomponents;
 
+import ch.unibas.dmi.dbis.cs108.casono.client.ClientApp;
 import ch.unibas.dmi.dbis.cs108.casono.client.game.GameService;
 import ch.unibas.dmi.dbis.cs108.casono.client.game.GameState;
 import ch.unibas.dmi.dbis.cs108.casono.client.game.Player;
 import ch.unibas.dmi.dbis.cs108.casono.client.game.PlayerId;
 import ch.unibas.dmi.dbis.cs108.casono.client.game.PlayerState;
+import ch.unibas.dmi.dbis.cs108.casono.client.network.LobbyClient;
 import ch.unibas.dmi.dbis.cs108.casono.client.ui.lobbyui.Casinomainui;
 import javafx.fxml.FXML;
 import javafx.scene.control.Alert;
@@ -1079,4 +1081,44 @@ public class TaskbarController {
     private void onBrowserButtonClick() {
         CasinoBrowserController.open("wikipedia.org");
     }
+
+    /** Opens the highscore popup window from the taskbar. */
+    @FXML
+    private void onHighscoreButtonClick() {
+        try {
+            var shared = ClientApp.getSharedClientService();
+            if (shared == null || shared.isOffline()) {
+                Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                alert.setTitle("Info");
+                alert.setHeaderText(null);
+                alert.setContentText("No active server connection for highscores.");
+                alert.showAndWait();
+                return;
+            }
+
+            javafx.fxml.FXMLLoader loader =
+                    new javafx.fxml.FXMLLoader(
+                            getClass()
+                                    .getResource(
+                                            "/ui-structure/gameuicomponents/HighscoreView.fxml"));
+            javafx.scene.Parent root = loader.load();
+
+            HighscoreViewController controller = loader.getController();
+            controller.setLobbyClient(new LobbyClient(shared));
+            controller.refreshHighscores();
+
+            javafx.stage.Stage stage = new javafx.stage.Stage();
+            stage.setTitle("Casono Highscores");
+            javafx.scene.image.Image icon =
+                    new javafx.scene.image.Image(
+                            getClass().getResource("/images/logoinverted.png").toExternalForm());
+            stage.getIcons().add(icon);
+            stage.setScene(new javafx.scene.Scene(root));
+            stage.show();
+            stage.setAlwaysOnTop(true);
+            stage.toFront();
+        } catch (Exception e) {
+            LOGGER.error("Could not open highscore window from taskbar: {}", e.getMessage());
+        }
+    }
 }

src/main/java/ch/unibas/dmi/dbis/cs108/casono/client/ui/lobbyui/CasinomainuiController.java

@@ -4,12 +4,15 @@ import ch.unibas.dmi.dbis.cs108.casono.client.ClientApp;
 import ch.unibas.dmi.dbis.cs108.casono.client.chat.ChatController;
 import ch.unibas.dmi.dbis.cs108.casono.client.network.ClientService;
 import ch.unibas.dmi.dbis.cs108.casono.client.network.LobbyClient;
+import ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.gameuicomponents.HighscoreViewController;
 import java.io.IOException;
 import java.net.URL;
 import javafx.application.Platform;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Node;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Alert.AlertType;
 import javafx.scene.control.Button;
@@ -20,6 +23,7 @@ import javafx.scene.image.ImageView;
 import javafx.scene.layout.AnchorPane;
 import javafx.scene.layout.VBox;
 import javafx.scene.shape.Rectangle;
+import javafx.stage.Stage;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -287,4 +291,33 @@ public class CasinomainuiController {
             LOGGER.error("Failed to create or add lobby: {}", e.getMessage());
         }
     }
+
+    /** Opens the highscore popup from the lobby UI. */
+    @FXML
+    public void handleOpenHighscores() {
+        try {
+            FXMLLoader loader =
+                    new FXMLLoader(
+                            getClass()
+                                    .getResource(
+                                            "/ui-structure/gameuicomponents/HighscoreView.fxml"));
+            Parent root = loader.load();
+
+            HighscoreViewController controller = loader.getController();
+            controller.setLobbyClient(lobbyClient);
+            controller.refreshHighscores();
+
+            Stage stage = new Stage();
+            stage.setTitle("Casono Highscores");
+            String iconPath = getClass().getResource("/images/logoinverted.png").toExternalForm();
+            stage.getIcons().add(new Image(iconPath));
+            stage.setScene(new Scene(root));
+            stage.show();
+            stage.setAlwaysOnTop(true);
+            stage.toFront();
+        } catch (IOException e) {
+            LOGGER.warn("Could not open highscore window: {}", e.getMessage());
+            showAlert("Could not open highscore window.");
+        }
+    }
 }

src/main/resources/ui-structure/Casinomainui.fxml

@@ -81,15 +81,17 @@
                         </GridPane.margin>
                     </Button>
 
-                        <!-- Username input and login/change button -->
-                        <HBox alignment="CENTER_LEFT" spacing="10"
-                              GridPane.rowIndex="0"
-                              GridPane.columnIndex="0"
-                              GridPane.halignment="LEFT"
-                              GridPane.valignment="TOP">
-                            <GridPane.margin>
-                                <Insets top="100" left="20" />
-                            </GridPane.margin>
+                    <!-- Username input + change name, with highscores directly below -->
+                    <VBox alignment="TOP_LEFT" spacing="10"
+                          GridPane.rowIndex="0"
+                          GridPane.columnIndex="0"
+                          GridPane.halignment="LEFT"
+                          GridPane.valignment="TOP">
+                        <GridPane.margin>
+                            <Insets top="140" left="20" />
+                        </GridPane.margin>
+
+                        <HBox alignment="CENTER_LEFT" spacing="10">
                             <TextField fx:id="usernameField"
                                        promptText="Username"
                                        styleClass="gray-input-field"
@@ -100,6 +102,12 @@
                                     styleClass="button-create-lobby" />
                         </HBox>
 
+                        <Button text="HIGHSCORES"
+                                styleClass="button-create-lobby"
+                                fx:id="highscoreButton"
+                                onAction="#handleOpenHighscores" />
+                    </VBox>
+
                     <VBox fx:id="casinoTable"
                           alignment="CENTER"
                           styleClass="casino-table"

src/main/resources/ui-structure/gameuicomponents/HighscoreView.css

@@ -0,0 +1,139 @@
+.highscore-root {
+    -fx-background-color: rgba(13, 158, 59, 0.96);
+    -fx-background-radius: 16;
+    -fx-border-radius: 16;
+    -fx-border-color: #5c3d10 #3d260a #3d260a #5c3d10;
+    -fx-border-width: 3;
+}
+
+.highscore-title {
+    -fx-text-fill: #ffffff;
+    -fx-font-size: 24px;
+    -fx-font-weight: bold;
+    -fx-effect: dropshadow(one-pass-box, #000000, 0, 0, 2, 2);
+}
+
+.highscore-status {
+    -fx-text-fill: #ffffff;
+    -fx-font-size: 13px;
+}
+
+.list-view {
+    -fx-background-color: #114d26;
+    -fx-control-inner-background: #114d26;
+    -fx-background-insets: 0;
+    -fx-background-radius: 12;
+    -fx-border-radius: 12;
+    -fx-border-color: #5c3d10 #3d260a #3d260a #5c3d10;
+    -fx-border-width: 2;
+}
+
+.list-view .list-cell {
+    -fx-background-color: transparent;
+    -fx-text-fill: #ffe89a;
+    -fx-font-family: "Courier New";
+    -fx-font-size: 13px;
+}
+
+.list-view .list-cell:filled {
+    -fx-background-color: rgba(0, 0, 0, 0.14);
+}
+
+.list-view .list-cell:filled:hover {
+    -fx-background-color: rgba(0, 0, 0, 0.24);
+}
+
+.list-view .list-cell:filled:selected,
+.list-view .list-cell:filled:selected:focused {
+    -fx-background-color: rgba(0, 0, 0, 0.35);
+    -fx-text-fill: #ffffff;
+}
+
+.gray-button,
+.yellow-button,
+.red-button {
+    -fx-background-radius: 10;
+    -fx-border-radius: 10;
+    -fx-font-family: "Courier New";
+    -fx-font-weight: bold;
+    -fx-border-width: 2;
+    -fx-padding: 6 12;
+    -fx-cursor: hand;
+}
+
+.gray-button {
+    -fx-background-color: #333333;
+    -fx-border-color: #666666;
+    -fx-text-fill: #cccccc;
+}
+
+.yellow-button {
+    -fx-background-color: #b8860b;
+    -fx-border-color: #ffd700;
+    -fx-text-fill: #ffffff;
+}
+
+.red-button {
+    -fx-background-color: #8b0000;
+    -fx-border-color: #ff4444;
+    -fx-text-fill: #ffffff;
+}
+
+.highscore-root {
+    -fx-background-color: #0d9e3b;
+    -fx-background-radius: 16;
+    -fx-border-radius: 16;
+    -fx-border-color: #5c3d10 #3d260a #3d260a #5c3d10;
+    -fx-border-width: 3;
+}
+
+.highscore-title {
+    -fx-text-fill: #ffffff;
+    -fx-font-size: 22px;
+    -fx-font-weight: bold;
+}
+
+.highscore-subtitle {
+    -fx-text-fill: #f2f2f2;
+    -fx-font-size: 13px;
+}
+
+.highscore-text-area {
+    -fx-control-inner-background: #1b1b1b;
+    -fx-text-fill: #ffffff;
+    -fx-font-family: "Courier New";
+    -fx-font-size: 14px;
+    -fx-border-color: #666666;
+    -fx-border-width: 2;
+    -fx-border-radius: 10;
+    -fx-background-radius: 10;
+}
+
+.gray-button,
+.green-button,
+.red-button {
+    -fx-background-radius: 10;
+    -fx-border-radius: 10;
+    -fx-font-family: "Courier New";
+    -fx-font-weight: bold;
+    -fx-border-width: 2;
+    -fx-padding: 6 14;
+}
+
+.green-button {
+    -fx-background-color: #1f7d33;
+    -fx-border-color: #35c759;
+    -fx-text-fill: #ffffff;
+}
+
+.red-button {
+    -fx-background-color: #8b0000;
+    -fx-border-color: #ff4444;
+    -fx-text-fill: #ffffff;
+}
+
+.gray-button {
+    -fx-background-color: #333333;
+    -fx-border-color: #666666;
+    -fx-text-fill: #cccccc;
+}

src/main/resources/ui-structure/gameuicomponents/HighscoreView.fxml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.control.ListView?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.layout.VBox?>
+
+<VBox xmlns="http://javafx.com/javafx/21"
+      xmlns:fx="http://javafx.com/fxml/1"
+      fx:controller="ch.unibas.dmi.dbis.cs108.casono.client.ui.gameui.gameuicomponents.HighscoreViewController"
+      spacing="12"
+      styleClass="highscore-root"
+      stylesheets="@HighscoreView.css">
+
+    <padding>
+        <Insets top="14" right="14" bottom="14" left="14"/>
+    </padding>
+
+    <Label text="Highscores" styleClass="highscore-title"/>
+
+    <ListView fx:id="highscoreList" prefHeight="320" VBox.vgrow="ALWAYS"/>
+
+    <Label fx:id="statusLabel" text="Ready." styleClass="highscore-status"/>
+
+    <HBox spacing="10">
+        <Button text="Refresh" onAction="#refreshHighscores" styleClass="gray-button" HBox.hgrow="ALWAYS" maxWidth="Infinity"/>
+        <Button text="Clear" onAction="#clearHighscores" styleClass="yellow-button" HBox.hgrow="ALWAYS" maxWidth="Infinity"/>
+        <Button text="Close" onAction="#closeWindow" styleClass="red-button" HBox.hgrow="ALWAYS" maxWidth="Infinity"/>
+    </HBox>
+
+</VBox>

src/main/resources/ui-structure/gameuicomponents/Taskbar.fxml

@@ -19,7 +19,7 @@
 
     <!-- Placeholder buttons -->
     <Button text="SETTINGS" styleClass="gray-button" />
-    <Button text="INFO" styleClass="gray-button" />
+        <Button text="HIGHSCORE" onAction="#onHighscoreButtonClick" styleClass="gray-button" />
     <!-- Buten for the Casono Browser -->
     <Button text="HELP" onAction="#onBrowserButtonClick" styleClass="gray-button" />