Left 4 Dead 2 packshot image
The title adds melee combat to enable deeper co-operative gameplay, with items such as a chainsaw, frying pan, axe, baseball bat, and more.
Introducing the AI Director 2.0, L4D's dynamic gameplay is taken to the next level by giving the Director the ability to procedurally change weather effects, world objects, and pathways in addition to tailoring the enemy population, effects, and sounds to match the players' performance. The result is a unique game session custom fitted to provide a satisfying and uniquely challenging experience each time the game is played. Featuring new Survivors, boss zombies, weapons, and items, Left 4 Dead 2 offers a much larger game than the original with more co-operative campaigns, more Versus campaigns, and maps for Survival mode available at launch.
Left 4 Dead 2 GPU Performance Comparison Graph

Left 4 Dead 2 GPU Analysis
Comparing Left 4 Dead 2 PC system requirements to all GPUs shows that Left 4 Dead 2 is going to need a graphics card that is capable of DX 9 or OpenGL 3.1.

To get the best visual graphical experience on Left 4 Dead 2, aim to have a GPU that has at least 512 MB GPU RAM.

Most bottom end graphics cards currently available today, will probably allow you to play Left 4 Dead 2

We are advised that 11 year old graphics cards should be able to run Left 4 Dead 2 , but there could be a few exceptions to this rule.

Note that most games do not officially support laptop graphics cards, but nowadays many laptop graphics solutions are capable of running modern games. Whether desktop graphics cards or laptop, try searching for your graphics card to compare against the Left 4 Dead 2 graphics card requirements chart below.