More than anything, Infinite Undiscovery proves that Tri-Ace has a little trouble writing a story.
First things first - Infinite Undiscovery is an action RPG that's very linear. There are no elaborate quests in the game; it's pretty much a straight shot through the entire narrative with maybe one or two side detours, though those never last very long at all and really aren't even worth pursuing as they give you little in the way of rewards. Regardless, the few bits and pieces of the story that manage to come together are actually enough to keep you going, if only because they're presented in a way that's so incredibly simple that it will be impossible for this game to confuse you or make you think. Which, when you think about it, is a blessing in the realm of Japanese role-playing games.
As for the gameplay, this title really shines in its combat and only in its combat. Outside of combat, you'll most likely either be running from point A to point B stopping every now and then to pick up the odd piece of fruit or open a treasure chest, but in combat Tri-Ace really flexes their muscles. As an action RPG, Undiscovery is completely real-time and as many JRPGs are doing these days, there is no transition from field map to battle - you just pull out your sword and start hitting things. One button will do a fast, weak attack that can be chained up to three times and can be followed by a strong attack which is mapped on another button. Different button combos will unleash different special attacks which are divided into the categories of Air and Ground - but to be honest, you won't ever need to use Air combos and you can pretty much ignore them. Holding down the Weak or Strong attack will unleash a special technique that usually involves Capell hitting whatever he's targeting twenty or so times (this usually kills anything but a boss). These attacks are visual feasts with lots of sword trails and sparklies and neat effects.
Joining Capell in battle are his trusty side kicks - of which there are quite a few, though you can only have three with you at a time. One of the most interesting things you can do with these side kicks is split them up into three different parties. Once you do the other two parties will go off and do their own thing, while you get to control the original one. This is most often used in the more advanced dungeons and while it's a lot more shallow than it sounds, it goes a long way into fooling the player into thinking they're getting a more dynamic experience - which is better than nothing.
Rounding out the things you can do is crafting (wouldn't be a Tri-Ace game without crafting, now would it). Sadly, crafting is next to useless. You can get some pretty cool items, but you neither need them nor will you want to take the effort to create them by the time you get to the end of the game.
On the presentation side of things, Infinite Undiscovery is straddling a pretty thin line. One one side, the graphics are technically proficient, but they're wasted on bland level design that honestly wants to look good, but fails. You can almost hear the trees in the game yelling, "HELP! Save me from this horrible level designer!" Echoes of potential wasted. The games makes great use of shader effects and rarely chugs unless there's a lot of special attacks being fired off during a battle - in which case, the framerate drop actually makes it look cooler, so I can't complain. The audio department is entirely forgettable, especially the voice acting which you'll have to literally force yourself to leave on. If you can't do that, I'd bet my first child you'll turn the voices off during the first ten minutes. The music is standard JRPG faire and nothing special, and the spell effects and cutscene audio production are barely there.
In conclusion, Infinite Undiscovery is a game that really wants to be great, but suffers greatly from a heavy dose of missing polish. Tri-Ace needs to learn a thing or two about story writing and then get back to us, and they're level designers need to do a better job. If you can overlook these things, then there's a decent game here - but overlooking those things is going to take a lot of work.