IGN has an a quick look at the first 30 minutes of Portal 2.
Check out more of the preview over at IGN.
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No longer is GlaDOS one of the few things you hear. Instead, the facility sprawls before you and throughout its grassy expanse chirp birds over a drone of crickets. Depending on the level of action, music on the soundtrack can range from soothing arrangements of wind instruments to pulsing electronic synths. The prerecorded messages of a male voice follow you throughout the opening simple test chambers. A portal gun is made available very quickly after starting out. Like in the first game, it can initially shoot only one portal, slowly easing you into the mechanics. Veterans will be able to breeze through while newcomers will no doubt appreciate the simple lessons taught early on.
It's not instantly recognizable while playing, but Valve has designed the game so that no characters talk when it comes time to solve a puzzle. This means there'll be as few distractions as possible while you're lining up long-distance jumps and transporting cubes through portals to trigger switches and open doors to the next testing chamber. When the puzzles are over, though, there's a character talking at you almost every step of the way.
It's not instantly recognizable while playing, but Valve has designed the game so that no characters talk when it comes time to solve a puzzle. This means there'll be as few distractions as possible while you're lining up long-distance jumps and transporting cubes through portals to trigger switches and open doors to the next testing chamber. When the puzzles are over, though, there's a character talking at you almost every step of the way.
Check out more of the preview over at IGN.