Left 4 Dead 2 Cheats

To get the achievement 'Tank Burger', you have to kill a tank using nothing but melee weapons. If you have The Passing DLC, then you should have the 'Mutations' game mode. There is one mutation type where you have nothing but chainsaws. All you have to do is get through the campaign until you get a tank. Once you do just run straight to him and maul him with the chainsaws until he falls to his death.

You can only do this with 2 controllers. go into scavenge and play with both controllers have your main acc win all of them and get as many gas can drops, etc. then you'll wind up getting the achievements in about 4-5 hours depending on when you start doing this. I recommend doing the 1st five on port if you have the passing

in the i think 2nd chapter of the passing when your about to go underground a truck will drive by really fast and honk it's horn,i always forget to look at the van so i don't know what it looks like