1. http://www.tutorial9.net/photoshop/design-a-stylish-retro-game-boy-poster-in-photoshop/ – Stylish Retro Gameboy poster
2. http://www.tutorial9.net/photoshop/amazing-vector-retro-rainbow-curves/ – Really tight retro rainbow curves
3. http://www.tutorial9.net/photoshop/create-a-retro-pop-style-wallpaper/ – Abstract retro wallpaper.
4. http://www.pstut.info/photoshop-tutorials/design-a-3d-retro-strip/ – a really cool retro strip design. (In case you get confused: this website has pages for the tutorial on the bottom).
5. http://abduzeedo.com/super-cool-retro-poster-10-steps-photoshop – a really cool retro poster in photoshop.