Any of the Ace Attorney games
Any of the Castlevania games, with special mention of Order of Eclessia
Dragon Quest IX
Final Fantasy Tactics: Advanced and Advanced 2
Any Fire Emblem game
Ghost Trick - This one gets a special note, as it's a great puzzle game with a surprisingly great story. Must buy
Lock's Quest
Shin Megami Tensei: Strange Journey and Devil Survivor 1+2
Any of the Pokemon games, with special mention of Pokemon Conquest
The Professor Layton games
Radiant Historia - one of the best turn based RPGs that you will ever play. The combat is actually fun and intuitive, and the story is excellent to boot
Rune Factory - I personally recommend 1 and 3. 2 is alright, but annoys the fuck out of me because 2/3+ of the game is locked until you have a kid
The Dark Spire
There. I think that's good enough. That should last you a month or five
