Zombie Genocidist & Tank Burger

Zombie Genocidist

Achievement: Kill 53,595 Infected

This is probably the most self explanatory achievement in the whole Left 4 Dead series. It came from one of the things written in the safe room on rhe fourth round of No Mercy when you get to Mercy Hospital.

It takes the longest to get this achievement than any of the others. Just kill and kill and kill.

Tank Burger

Achievement: Kill a Tank with melee weapons.

It is pretty much impossible to get the achievement alone, so I don't recommend attempting to get it that way. Either arrange it with a group on XBox Live or play Co-OP and get the Tank far from the remaining two bots.

My cousin and I got it when we played the bridge finale in The Parish campaign. We had machetes and the remaining bots were far behind and the second Tank came into the helicopter and we kept slicing him. New achievement!
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