Shin Megami Tensei

Starting with the first instalment in 1987, the Shin Megami Tensei franchise is a collection of games tied together by their theme and covering a wide variety of role-playing genres, including tactical role-playing, action role-playing, and massively multiplayer online role-playing. Hugely popular throughout it's history, the games have been found on just about every console available since the late 80's in some form or another.