Indie Royale has launched the Birthday Bundle, a package that includes five titles ranging from transport simulation via infamous action, strategy & lunar voxel games to soothing puzzles: 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 & Perfection are also available for Mac. Perfection is also on Linux.
The bonus target is $8 to get all the games plus the album Theme Tune For 10 Games Never Made from Remute (available in FLAC and MP3).