 | Comment #1 by megamanxzxz
Thursday, July 15, 2010 @ 01:37:47 PM
you can play the finale and just never turn the generator back on. wave after wave of normal infected will come after you with no tank |
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 | Comment #2 by jollyausten
Wednesday, January 05, 2011 @ 07:56:01 PM
thanks alot for the tip |
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 | Comment #3 by Konner94
Sunday, March 20, 2011 @ 12:37:54 PM
looking for people to work together on left 4 dead 1 and 2 and get achievements its awin win situation all work together it would be nice if i could find 2 other people at least please message me and im 16 so if your someone wondering if im like 10 or something. my gamer tag is "Konner94".
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 | Comment #4 by Mr Octapuss
Wednesday, August 03, 2011 @ 01:45:36 PM
I can confirm that playing survival counts towards this if you do it on crash course maps. |
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 | Comment #5 by Trouble
Monday, August 15, 2011 @ 04:28:47 AM
Thanks for the tip. |
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 | Comment #6 by Yug1D0rk
Thursday, January 05, 2012 @ 09:19:10 AM
so after around 2 hours of boosting, I have about 3500 Zombies killed. Basically, take some time off if you want to boost for this alone |
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 | Comment #7 by elmorocks280
Tuesday, February 14, 2012 @ 02:52:03 PM
thanks for the tip
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 | Comment #8 by octard
Friday, February 15, 2013 @ 02:35:02 AM
Looking to boost this
GT: octard |
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 | Comment #9 by TimesTheory
Friday, February 22, 2013 @ 03:24:45 AM
Been going it alone .. makes this one pretty time consuming. x_x |
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