Is possible to play left 4 dead 1 campaign in left 4 dead 2 without having left 4 dead 1?

Yes...you can play L4D1 campaigns in L4D2. But I'm not sure if you can play with people that only have L4D1 while you play L4D2.

Of course, yes.

Yes.

yea but only with people who own l4d2.. there is a DLC coming for l4d2.. dont know if u can play after it is released..

Thanks for all the quick answers :3 NOW GO AND VOTE 75% LEFT 4 DEAD 2 PLEASE!!! xD

dont waste your time, better buy L4D2. It has ALL the content from L4D and the additional melee weapons. Also all the free DLC, such ass the passing and the sacrifice. You won-t be playing with people from l4d, becasuse it doesn-t support the melee weapons. L4D2 its a really cool game, add me if you want and we could play through campaign or survival or whatever >D.

BTW, i totally voted for L4D2, we need moar people nline XD

You can, but only with the new specials. Some players prefer the vanilla L4D1 specials and those maps.