as most people know this is the hardest achievement to get in the game, myself, tetlee, crovon, and anodyne have been playing this most nights and got no where really in the game for this achievement, i have tried it myself playing with 3 AI players and got quite far on no mercy, but the tank always hits us as the AI never run away, this was the problem, we ned to use an open area so the AI can at least move back while shooting at the tank, tetlee always recommends death toll but i always find its too open for smokers to attack from the woods, i did however not think of blood harvest, more woods u think? yes but when i got my 'not being vomited on by a boomer' achievement i did it on blood harvest, i just ran and let the AI take care of the boomer then carry on running, the point is this level is best for running through the game as it's pretty clear which route to go, so i looked into anyone who has tried this route, now i saw these videos, im not sure if this is the 360 or pc version but it's the same game and looks to be the same route, one thing i never thought of with the tanks is that on the video the guy uses the propane tanks which u will see does a lot of damage to the tank and the AI seem to take care of the tank easy enough, i guess being on this level it gives u and the AI more chance of retreating back while constantly shooting, it was also a good idea at the end to stand where the rescue vehicle exits. this guy did it on normal so setting to easy should lessen the burden, also he got a little lucky on the bridge section where the safehouse is on the bridge as nearby there is a car which one of the AI sets off by accident so maybe that won't happen during your game. good luck with this and hope myself and others get this achievement as it's been a nightmare so far, but at least the videos will help and prove it is an achievement u can get. remember this is with the 3 AI players so if u plan to use human players it would be best to study the videos and plan your game. check out the videos (in 3 parts) part 1 YouTube - Left 4 Dead how to get "Nothing Special" with three bots PT1 part 2 YouTube - Left 4 Dead how to get "Nothing Special" with three bots PT2 part 3 YouTube - Left 4 Dead how to get "Nothing Special" with three bots PT3 good luck.