Geforce 6150 le left for dead

Official requirements cite an "NVidia 6600 or better" so probably not. Depending on your CPU though, you may be able to pull it off, Source Engine games are less GPU dependent.

I highly doubt it. The 6150 is integrated graphics, and based on a gpu that's several years old too.
You might be able to get it to work with everything on low at 640x480, but it would be best to buy a cheap dedicated graphics card.

Hi!
I had a Geforce 6200 TC which is lil better than 6150.
I ran L4D on my pc(Having C2D processor) and at the lowest settings I was getting slight lag...

So I don't think that game will run in your PC...
You have to upgrade to a better gfx card...

agree it will prolly lag alot, and u can always try but playing on all low settings really takes everything out of the game, i now play left 4 dead on my new rig that i build on all high with aa 8x and the other one at 16x at 1920x1080 res on a 23in monitor and wow this the whole gameplay and everything seem amazing. Now its really a blast to play it. At least i recommend u get a better graphic card. doesnt have to be super but so u can play on medium settings or so.