Lately I've been seeing people bashing Intel graphics because they are incompatible with Blockland's shaders. Many people seem to imply that Intel graphics are completely useless for gaming. These assumptions are mostly false, because I am able to Source games smoothly on medium settings on my sister's 2-year-old laptop with Intel Graphics. She is able to run her newer Sims 3 games at low settings with decent performance.
Intel Graphics cards are not designed for gaming, they are designed for Internet and basic multimedia. Many Intel cards, especially the older GMA ones, can't even support newer versions of DirectX.
If that wasn't bad enough many (if not all) Intel cards are integrated which isn't ideal to put it kindly. You don't buy a computer that only has Intel graphics if you want to game. These cards often have low memory capability. They simply can't process game graphics efficiently. Some of the newer HD cards are OKAY but again you aren't going to get good gaming performance. You might get mediocre gaming ability with some games. Some.
Being able to play games on them does't make them good. It just means you were lucky enough to find a game that can be stretched to run on it. You can play Portal with an older Intel card, but only on low settings.