Sphinx and the Cursed Mummy

Ancient Egyptian mythology comes to life in the Sphinx and the Cursed Mummy. You play the role of Sphinx, a headstrong demigod who travels the world via portals to foil the evil plans of Set. Equipped with a magical sword and a blowpipe, you'll need all your wits, agility, and special powers to overcome powerful enemies. When being inconspicuous is the only solution, control Sphinx's reluctant hero friend, The Mummy. By finding the stolen magical crowns of Egypt, Sphinx can stop Set and save the world.

Minor Graphical Issues
Minor graphical issues occur in the display of sloped landscapes. Fixed sometime before.

High Definition texture pack
User:Swyter has created a mod that updates most of the text and interface elements (HUD, Book of Sphinx, item icons) of the European version, improving its legibility while retaining the original feel, palette, typography and design rules.

There's a discussion thread in the Dolphin Forums, the full repository can be found in GitHub and downloaded as a ZIP file which can then be extracted under  /Load/Textures/.