Ratchet & Clank was a real breath of fresh air when the first game was released on the PlayStation 2 back in 2002. It combined the movement and action of a platform game with the firepower of a shooter, and the end result felt pretty unique. Over time, the formula shifted around a bit, but the Ratchet & Clank games we're seeing today still fall in line with that same blueprint. Size Matters is the first time the series has appeared on the PlayStation Portable, and it's got just about everything you'd want out of a Ratchet & Clank game, including a good sense of humor, interesting weapons, and sharp level design.
At the beginning of this adventure, Ratchet and Clank are on vacation and lounging around, when they're approached by a little girl named Luna, who wants to take some pictures of Ratchet acting heroic. He sets off to bust up some robots and the girl is kidnapped, dropping a device that points the duo toward a mysterious race of tiny creatures. So they're quickly off on their quest to get the girl back, which of course leads to another plot twist, which sets them off in search of something else, and so on and so forth. Without detailing the particulars of the game's plot, all you really need to know going in is that the game's story is good, and it drives the action along quite effectively.
That action progresses along mostly linear levels. Ratchet has his full arsenal of attacks from the other games, so he's armed with a large wrench that you can swing or throw, and you earn more and more weapons along the way. The weapons have always been a big part of the series, and the guns you'll find in Size Matters stay true to the legacy of the series, starting with basic laser-pistollike weapons, a rocket launcher, a sniper weapon, acid bombs, little robots that run up and attach to your enemies, and so on. Some of the weapons are more useful than others, though. The concussion gun is the game's shotgun equivalent, but the shots are so spread out that it's practically useless. As you eliminate enemies, the weapons you use gain experience, and when you fill an experience meter, they change into more powerful versions of the same weapon. This means you'll eventually have dual laser pistols, more-damaging rockets, and so on. You can also purchase mods for your weapons in a couple of spots, and this gives a few weapons lock-on targeting or different types of shots. The weapons have always been the star of the show, and they shine just fine on the PSP.
In addition to upgrading your weapons, you'll earn more life points as you eliminate enemies, getting you up to a total of 50. You can also collect pieces of armor and swap them out at will. You'll find helmets, gloves, chest pieces, and boots of different types. If you can collect a complete matching set of armor, you'll get a bonus to your wrench attacks, like fire or ice, but some of those armor pieces can be tough to find, so you'll have to search around if you want some of the more advanced sets.
The gameplay stays true to the series, giving Ratchet & Clank all of their best moves. Ratchet can double-jump, and with Clank on his back, you can pop up some propellers to slow your descent after a jump. A big part of firing your weapons at enemies in these games has been your ability to strafe back and forth. By default, the game puts strafing controls on the D pad, while the analog stick is used for normal movement. That may take some time to get used to, but in the end, it works out well. The camera controls are on the shoulder buttons, letting you rotate the camera at will. There's another camera option that attempts to stick behind you, but it doesn't work so well. Neither of the camera controls are ideal, but that's really only because every other meaningful game in the series has been on the PS2, where the right analog stick is just fine for camera control. If you're familiar with the rest of the series, you might notice that you're getting hit from the sides and from behind more frequently than you're used to. That's the camera control. While it can occasionally be annoying, it's hard to imagine a better system, given the limitations of the PSP's controls.