Fun and graphically very pretty puzzle-platformer, but physics and controls could have used a little more work.
For starters, the game is a physics-based puzzle platformer for one to three players set in a fantasy world. You play as a Thief, Knight, and Wizard, all of which have a unique personality and play mechanics. The game begins with a tutorial level that is single-player only, and which explains the basic mechanics for each character as they join up with each other. From level 2 onward, however, a second and third player can join in by pressing the Start button on their controllers, and can drop out by pausing the game at any time. If playing single player, you are able to switch between each character with the shoulder buttons.
The Thief character is equipped with a grappling hook and bow. The grappling hook allows her to swing across pits and access hard-to-reach areas, but only if their is a wooden surface above her for the grappling hook to latch into. No wood means no grappling hook. She can also aim and charge her bow by pressing the right analog stick in the direction she wants to fire, and eventually can learn a fire arrow ability that can be used to attack enemies or light torches in dark areas. Her character seems to be the most popular since her grappling hook is a little overpowered. Perhaps if they had required the grappling hook and/or bow and arrow to consume energy, her character might have felt a little more limited and balanced.
The Wizard character is a lazy wizard who spends too much time chasing after women and not enough time learning magic. As such, the only useful spells he knows are Levitate and Materialize a Box. Later on, he learns the ability to Materialize Bridges as well. He has no direct offensive abilities, but boxes and other objects can be levitated and dropped on most enemies to kill them. You move a cursor with the right stick and use the shoulder buttons to Levitate objects highlighted by the cursor. You can also draw a square in the air to make boxes of varying sizes or (later on) a straight line to draw a bridge. Its a simple, yet satisfying mechanic, although you are also able to rotate Levitated objects by tilting the PS3 controller, which, due to the flimsy nature of the PS3's motion-sensor, makes keeping objects level very difficult. The Wizard is quite probably the single, hardest character in the game to play as, but with a skilled, dexterous, and creative player in control of the Wizard, he can be the most useful character in the group.
The Knight character is a less-than-intelligent brute equipped with a sword and shield. The square button swings his sword and the right stick can be used to directionally aim his shield, which he can use to defend himself and his allies from attack or environmental damage. He also eventually gains the ability to pick up and throw large objects (very fun applications for this ability, by the way), and perform a charging kick that is an instant kill for many enemies and useful for dispatching enemies that carry their own shields.
The basic premise is that the King of some great country has died, leaving no heir, and a power struggle ensued, setting of some magical power that caused the dead to rise, form an army, and begin to march on the kingdom. You're three characters start out in a place called the Astral Academy, where they find a magical artifact called the Trine that binds their souls together and points them in the direction of a way to defeat the undead army. You must then navigate through a series of levels full of environmental obstacles and occasional groups of undead soldiers. Levels contain pit and spike traps, fireball-shooting canons, swinging platforms, underwater dungeons, and so on, and all the levels are colorfully rendered in very attractive high-definition graphics that demonstrate very high production values. Your characters must use their various abilities (some of which require energy that is not rechargeable) to navigate the environment, defeat enemies, and reach the exit to the next level. The game is also very long for a downloadable level, easily containing several hours worth of straight gameplay even for a group of players who knows exactly where to go and what to do. Throughout the levels are also scattered magic energy vials that will refil your magic energy and green experience vials that can be used to level up your characters' abilities in a very simple but adequate character leveling system. There are also chests that can contain useful items that each character may equip. Collecting all the Green Experience vials in any given level will also net you a PSN Trophy, and there are other PSN trophies for completing various other game tasks, but NOT for simply completing a level. They make you work for your Trophies.
As a single player game, it is less than satisfying, as you are constantly having to switch from character to character, and many situations are made too simple by the fact that the Theif character is usually able to get around most obstacles with her grappling hook. And you only have to worry about getting your one character past any given obstacle.
In multiplayer, however, the game is much more fun, as you have the added challenge of having to find a way to get all three of your characters past most obstacles. Although sometimes it can be too easy to just kill a character or two and then run to the next checkpoint to resurect them, and only one character needs to reach the end of the level to progress. So if a checkpoint or the end of a level is on the other end of a pit trap, you only need to get one character across and the others can be killed or left behind, which takes away some of the challenge. Also, if two characters proceed with the level and leave the third character behind, that third character will usually just "teleport" to catch up to the other players. But for the most part, cooperation is essential in multiplayer play, and having three people opens much more avenues for creative problem-solving than the single player game, thus, adding to the fun. The levels themselves are typically simple enough, but trying to find and acquire all the experience in a level can be a bit tricky.
Solving puzzles can sometimes be a bit more difficult than it needs to be thanks to some problems with the game's physics. Objects sometimes bounce or fall in akward ways or objects don't necessarily interact with each other in the way you'd expect. Having to try to hold the PS3 Sixaxis controller perfectly level with the ground when trying to prevent a Levitating platform from rotating is much more difficult than it needs to be, and if a character is standing on the platform, he or she should make sure to stand in its center of gravity. Some of the difficulty with the wizard character would have been at least somewhat mitigated if the game had options for adjusting the Sixaxis sensitivity. But I guess that is the difference between a $15 Indie game and a $60 Mega-Publisher's titles. The game's very vibrant and colorful graphics also sometimes make if very difficult to tell what objects are directly interactible and what isn't, as well as frequently making it hard to see exactly what is going on. A Smash Bros-style camera that never seems to be positioned where you want it doesn't help matters. Often, the camera will refuse to zoom out to a position for you to see something that you want to see, and this is especially troublesome if you have 3 players and everyone is far apart from one another. The Wizard's magic can also be very difficult to use if the other players are jumping around, as drawing the shapes necessary to create objects and keep levitating things level becomes unnecessarily hard. The Undead enemies also have a habit of respawning right behind you, and you may not notice them until they attack you and a quarter of your HP are lost. Visibility ended up being a big problem for the group I was playing with, and one of my friends found the game to be completely unplayable because his vision is not so good (even with glasses) and he described the game's graphics as being "Busy". So much so, that he had no idea where his character was, where he was supposed to be going, or what he was supposed to be doing. But then again, he just likes to complain about console games in general, and if he had played it on PC, he'd probably be perfectly fine with it.
Overall, Trine is a very entertaining game that I would highly recommend (especially at its price point) assuming you have one or two other people who will play it with you. You'll be treated to a long and intellectually challenging game that is beautiful to look at and has a very nice (although repetitive) soundtrack and simple game mechanics that give you a great deal of freedom in dealing with the obstacles the game throws at you.