Support for Intel HD graphics
You can try Can You Run It?, though that will only work if you have a Windows machine, and, I guess, only after you bought the laptop.
As a general idea, what's the price range on the laptop you wanna' buy?
You should always rely on actual demos to see how a game runs on your machine, rather than comparing GPU models. Just because it is supported doesn't mean it will run well.
Generally, I've found that if you are trying to game on a laptop, and it has integrated graphics, then you will probably be sorely disappointed with the results.
Unless if you are running a game that is not graphics intensive, that is. Along the lines of Flash games or such.
I am of the demographic where I am really only interested in last-gen games, and I also need to pickup a new laptop (mine just fizzled out). The only requirement I really have going into is is that it have a dedicated graphics card. This way, I know I'll at least be able to run Fallout and Half-life2, which are the last two games I purchased ;)
Some game makers will claim that your integrated graphics card is inadequate even when it isn't. Can You Run It told me my system fails every single game I've tried, but I've managed to run some of them. So just try, and use a Virtual Graphic Card to fool the program if you need to.