Shin Megami Tensei: Devil Summoner: Raidou Kuzunoha vs. The Soulless Army (Boo! Bad title. Fix your title)
This one hurts, because it does some things so exceedingly well and others so inexplicably poorly, how much someone likes this game will depend almost entirely on what they value. It has the greatest and most interesting setting of an SMT game I've played (and MT2 and SMT2 have fantastic settings). It uses its demons and its conspiracy plotline to express the xenophobia, militarism, and acceleration of technology that was troubling Japan during that time; it's really cool to see an RPG that references history so thoughtfully. I also like that our protagonist is a supernatural detective, and how powers from demons you've captured are used to influence people and objects in the game world. The environments alone, which reanimate period Tokyo make the game worth checking out.
What's baffling is how completely lame the combat is. SMT, especially in the PS2 era, had a great turn-based system, and man did they bungle their first shot at action RPG. It's slow and unresponsive, and using friendly demons and strategy is often less effective than just running around, slashing enemies and blocking attacks. It's really a slog, made worse by the back chunk of the game which would be a bit tiresome even with a good combat system.
It's a really mixed bag, but I'm going to lean towards 'worth playing' if just for its world and ambitions.