## 3 The Design and Implementation of the AR Enhanced Game \"Exploring Ancient Greece\"
### Game Implementation  
For the implementation of the game, the game engine Unity (version 2022.3.0f1.0.13515), Blender (version 3.6.5), Adobe Premiere Pro (version 9.0.0), Adobe Photoshop (version 13.0), and Adobe Audition (version 8.0.0.192) were used. More specifically, the Unity game engine was  
Figure 4: The scepter of [PERSON].  
Figure 5: A question in the “Quiz Game” level depicting the god associated with the correct answer to the question in front of the physical surrounding of the player. In red we see the question “The temple in Navos known as “Portara” was devoted to god:”, and below three buttons representing the available choices: “[PERSON]”, “[PERSON]”, and “[PERSON]”.  
chosen because it facilitates easy and rapid game development, implements the majority of the necessary technologies, and is supported by ample learning materials and examples available online. Additionally, it works in conjunction with the C# programming language, one of the most popular programming languages globally, and the games implemented can be exported for various operating systems such as Windows, Android, and iOS. Blender was used for creating and editing the graphics. Adobe Premiere Pro was employed for video creation, Adobe Photoshop for image editing, and Adobe Audition for audio editing. Lastly, for testing the game on mobile devices during development, the free Unity Remote 5 (version 5.1) app from the Google Play Store was used, allowing instant game execution on the device without installation.  
Graphics in an educational game for young children are crucial as they must capture their attention and present a pleasant image. Therefore, the archaeological site graphics in the \"Learning through Traveling\" level and the historical objects in the \"Quiz Game\" level were selected from the website Sketchfab free of charge. Additional graphics for the \"Escape Room\" level were chosen from the Unity Asset Store. Images for video presentations were sourced from copyright-free material found on Google Images. Background music and sound effects, such as menu music, reward and error sounds, and nature sounds, were selected from Pixabay.  
For the representation of 3D graphics of archaeological sites and objects with AR, the XR Origin tool provided by Unity was utilized. This tool is essential for developing applications that require immersive technologies such as Virtual Reality (VR) and Augmented Reality (AR). The XR Origin tool enables developers to specify various elements crucial for AR experiences, including the graphic elements to be displayed, the default camera of the mobile device, and the interaction with the camera's movement through various parameters. This interaction is managed by adjusting parameters such as the position, rotation, and scale of the 3D objects in response to the user's movements and the device's orientation. Additionally, XR Origin supports advanced features like plane detection and environmental understanding, which are vital for accurately placing virtual objects in a real-world context. By leveraging these capabilities, the tool ensures a seamless and interactive user experience, making it a powerful component in the development of educational games that incorporate AR elements.