Well, as far as the three game thing goes, Nintendo has stated that you buy the first game for roughly $40, then after completing the final chapter, you can buy the other two for about $20. That totals to about $80, and then regional tax bumps it up to around $90, plus or minus a few. Not to mention, unlike Pokemon, each game (minus Revelation) has its own set of characters. All three games have their own storyline, too. The gist of it, just for anybody who doesn't know, is that:
- Conquest: Extremely hard, revolves around taking out a corrupt king from within
- Birthright: About as easy as Awakening (if you've played that), revolves around protecting Hoshido from the "evil" Nohrians
- Revelation: Unknown difficulty, goes through what happens if you simply opt-out of everything.
I haven't played the games that have Successor Systems, only the GBA ones, yet i was always curious in experimenting them.
Path of Radiance/Radiant Dawn are probably more your type, then. If you're interested in the 3DS ones, the main difference is that the relationship system is universal, meaning the characters can marry just about whoever, and get a 1.5x buff on hit rate/evasion by doing so. Anyone who claims the 3DS games are fully based around supports/marriage is wrong, though. Both of the 3DS games include multiple difficulties (Or at least I think Fates does), and higher difficulties aren't just high in name; they're actually hard. Awakening Hard is about what you'd expect of a Fire Emblem game, and then if you complete that you can play Lunatic mode, in which you will completely die unless you are the most amazing person in the world or you use a guide. If you want to go with Fates, I'd say get
Birthright EDIT: Conquest, it's supposedly (according to Kotaku) one of the hardest games ever, sub Dark Souls.