Hiya

I'm looking for a way to keep a log/score on how many kills of  NPC's a player does throughout a wipe

I want to be able to give the one with the most Kills at the end of the wipe a free Skin...  

If anyone can recommend a plugin or another way i would be so thankful :D

Cheers 

SlyStone

Sql database to keep track of kills and logs.
There are some paid plugins which do that.

Here is a example of what ive done with it:
http://anonymouscity-stats.com/

Do you have a  link to the paid plugins?

Nice website and servers btw! :)