SEGA & Atlus share total sales for their various franchises

Megami Tensei series (Launched 1987) – Approx. 7.2 million units across 28 total editions (packaged and digital total)
Persona series (Launched 1996) – Approx. 8.5 million units across 13 total editions (packaged and digital total)
Etrian Odyssey series (Launched 2007) – Approx. 1.8 million units across nine total editions (packaged and digital total)
Sonic the Hedgehog series (Launched 1991) – Approx. 360 million units / downloads (packaged and digital total)
Puyo Puyo series (Launched 1991, Sales Account for after 1998) – Approx. 25 million units / downloads / IDs (packaged and digital, AM-registered ID total (total for registrations after IP acquisition))
Yakuza series (Launched 2005) – Approx. 10.5 million units / downloads across 75 total editions (packaged and digital total)
Aladdin series (Launched 1989) – Approx. 570,000 units across 14 total editions (pachislot and pachinko machine and amusement machine total)
Beast King series (Launched 2001) – Approx. 490,000 units across 15 total editions (pachislot and pachinko machine and amusement machine total)
Phantasy Star series (Launched 1987) – Approx. 4.5 million Phantasy Star Online 2 IDs (cumulative total for registered IDs)
Chain Chronicle series (Launched 2013) – Approx. 10 million downloads across two total editions (packaged and digital total)
Sega feat. Hatsune Miku Project series (Launched 2009) – Approx. 5.5 million units / downloads across 52 total editions (packaged and digital total)
Hokuto no Ken series (Launched 2002) – Approx. 2.74 million units (pachislot and pachinko machine and amusement machine total)
Souten-no-Ken series (Launched 2009) – Approx. 440,000 units (pachislot and pachinko machine total)

from GoNintendo