Upgrader011 :
Your PC probably doesn't meet the mimimum requirements. And if you can tell me your PC specs that would be great I could help.
Playing steam games with an integrated chip isn't a very good idea. You should buy a graphics card
I doubt that it doesn't meet the requirements, it can run half life 1 without freezing. I am planning on getting card in a few months, but the integrated graphics should be able to run the game.
Pentium 4 processor (3.0GHz, or better), 1GB RAM, DirectX® 9 level Graphics Card, Windows® 7 (32/64-bit)/Vista/XP, Mouse, Keyboard, Internet Connection
I have an i5-3570k OC'd to 4.2, 8gb of 1600 ram, way about the recommended.