So you’ve familiarized yourself with the series and have even played Persona 3 and 4 to prepare for Arena. If you want more SMT goodness, where do you go next we’d suggest:
Devil Survivor Overclocked (3DS): An upgrade of the original DS version, Overclocked keeps the SMT tradition of incoming apocalypse, monster-collection and fusion, melding it with a hip teenage cast similar to Persona’s. Set in modern Tokyo, a group of teens are stranded in the city as angels and demons battle that leave the kids stuck in the middle. A strategy RPG, Devil Survivor puts the fate of the world, Lucifer and God Himself in the player’s hands. It’s hard to get much bigger than that.
Strange Journey (DS): If reading about the unreleased SMT originals piqued your interest for the main series, 2010’s Strange Journey for DS is as close as you can currently get. A dark, mature story, first-person perspective and similar focus on demon collection, Strange Journey is proves that traditional gameplay can still be as fun now as it was in the 90s. Search it out before DS games become totally scarce.