Theatrhythm: Final Fantasy (3DS)
As tired as I am of the Final Fantasy RPG formula, one thing I never got tired of is Uematsu's music. This game takes that music and incorporates a souped-up "Elite Beat Agents/Ouendan" rhythmic game play to go along with it. The match works so well, I haven't been able to put this game down in a week.
Gameplay
Like Elite Beat Agents and Ouendan, Theatrhythm's rhythm based gameplay centers around tapping/sliding/holding the stylus in time with visual cues. There are three primary triggers: small dot to tap the stylus, an arrow to slide the stylus in that direction, and a green dot/line to hold the stylus until the end of the line.
Using this basic gameplay system, the game has three main types of themes, in addition to two sub-themes. The sub-themes are the opening theme for each game and the credits theme, for which you simply tap the stylus at the right time to pop bubbles. You can't fail, but it will net you bonus points to upgrade your characters (more later). The main themes are Battle Theme, Field Theme, and Event Theme.
For Battle theme, my personal favorite, you select four characters to participate in the battle for a given game. That game's particular battle music will play, and each character has a trigger. For that character's trigger, if you time your rhythm perfectly, that character lands critical hits. If you string together enough critical hits, the character performs a special move (like a summon). If you miss, the character will take damage. You lose when all characters have taken damage to go to 0 HP total. It works so well I wish actual FF games implemented it.
For Field Theme, your character traverses the map of a particular FF game, with its field music playing. As the character moves along, the rhythm score also moves, and you need to move the stylus up and down on hold triggers to follow the movement of the hold line. If you mess up, the character will be slowed and lose HP, and if the song ends before you complete the journey, or you lose all HP, you fail.
For Event Theme, the game's signature song will play over an FMV for that game (for older games it's a game overview FMV, it's pretty neat), and the rhythm cues look almost exactly like EBA this way (except the cues aren't on the touch screen, they're on the 3D screen, so placement isn't so important as timing).
At the start, the only mode available to play is Series Mode, for which you select an FF game, select a four-character party, and you play the Opening Theme, Battle Theme, Field Theme, Event Theme, and Credits Theme for that game (during which the party characters maintain their HP numbers from theme to theme). As you complete specific themes, they become playable in Challenge Mode, which is simply a way to play just one theme at a time to try to improve your score. As you complete challenges and score high enough, you'll unlock Dark Notes which you can play at the Chaos Shrine, which are harder versions of existing themes, and completely new themes for each game. I haven't cleared 100% on the game yet, but there are a ton of things to do at the Chaos Shrine even after you clear every game in Series Mode.
If there is one drawback about Theatrhythm in comparison to EBA or Ouendan, it's that the rhythm cues aren't actually on the touch screen, they're overlaid over the action on the 3D screen. That makes the gameplay slightly simpler, as you don't have to focus on where on the screen you tap the stylus (although for Field play you do need to move along with the holds). On the plus side, you actually get to see more of what's going on at the top screen (when I played EBA, I almost never saw what was going on on the top screen).
Characters
To start, one character from each FF game 1-13 are available to select from. Characters have four ability stats: Strength, Magic, Agility, and Luck. Strength and Magic characters give more leniency in Battle Themes, and Agility/Luck characters make Field Mode easier. As you complete musical challenges at a high enough level, additional characters are unlocked (at least one per game thus far, not at 100% yet). When you complete a Theme, the characters you used for the theme get experience and level up. Each character can also use equipment to boost stats. The stats and equipment make a minimal difference to the actual rhythm gameplay, but the damage done during battles for successful critical triggers is heavily increased, and you progress further through the battle/field with better characters (which unlocks more stuff faster). It's a difficult thing to explain, but though the gameplay isn't affected by stats and equipment, the returns for the gameplay is.
Graphics
Square made a decision to put the rhythm cues on the 3D screen instead of the touch screen, and while it does simplify the gameplay a bit compared to EBA/Ouendan, it really lets the player see what's going on in the top screen. Whether it's battles, field, or FMV events, the nostalgia is so dense you can cut it. The classic characters have all been re-designed with a chibi art style that really does look fantastic, and the Battles in particular are a lot of fun to watch even while playing the game.
Sound/Music
The music is flat out amazing. Almost every classic FF track you can think of is included. If you like Uematsu's music, then...AWESOME. SO MUCH NOSTALGIA.
Game Life
And the ones that weren't included at ship are available as DLC. This makes it the first 3DS game with DLC, but there are enough tracks shipped with the game that you don't feel cheated with DLC tracks. If you never wanted to use the DLC tracks, there's enough content to keep you occupied for a long time. Each game of Series Mode takes about 20 minutes to complete at each difficulty level (Basic, Expert, Chaos), and perfecting a track can take days. You can even play multplayer over WiFi (but I haven't yet, so I'm not sure how it works) and connect via StreetPass. I've played the game for a solid week now (probably 25-30 hours) and haven't completed all the challenges yet, and haven't gotten close to 100% perfect on all tracks.
Recommendation
If you are nostalgic for the old days of Final Fantasy and enjoyed the music, and are a fan of rhythm gameplay like Elite Beat Agents or Ouendan, this game was made specifically for you. If you like rhythm gameplay but never cared much for Final Fantasy, it's still worth checking out, because the music is objectively fantastic. If you like Final Fantasy but aren't a fan of rhythm gameplay, it's still worth a look because the presentation is top notch and the nostalgia hits so hard. If you don't like FF and don't like rhythm games, then this game probably isn't for you.