Shin Megami Tensei: Devil Survivor Overclocked

After playing the game for a couple of hours i can say for sure that you can never go wrong with the SMT series and spinoffs.
If you have never played a SMT game this is an exellent starting point.

Devil Survivor Overclocked for Nintendo 3DS builds upon the game's original release with the addition of voice acting for the entirety of the game's lengthy, unconventional narrative.It's a stylish game that handily melds strategy and turn-based RPG battle. It's definitely one of the heftier 3DS games out there too, with multiple endings and tons of content to explore.

It is game to accumulate all sectors.

One of the great game of Shin Megami Tensei series.
If you have ever play the previous one just go straight for this.

Dark well developed story
Amazing and unique characters
Gotta-catch-them-all like monster fusing
Fun game-play mechanics
Multiple endings

Easily one of my favorite games, it lost one star because the 3ds version only added one sideline to the game + voice overs for all the characters. the 3d feature wasn't really used. still the voice overs is a big plus and I would recommend it to any gamer!