The Birthday Bundle from Indie Royale is live, and includes five titles: Cities in Motion 2, Duke Nukem: Manhattan Project, Impire, XenoMiner and Perfection. All the games are available for Windows via Steam except XenoMiner which is available via Desura with Perfection available from both. Cities in Motion 2, Duke Nukem: Manhattan Project and Perfection are also available for Mac. Perfection is also on Linux. If you pay $8 or over you will also get the chiptunes album Theme Tune For 10 Games Never Made from Remute. More information through the link.