Under rating threshold (hideshow)
I received these achivments
MASS MURDERER l GOLD DIGGER l INFECT
MASS MURDERER ll GOLD DIGGER ll INFECTOR
MASS MURDERER lll GOLD DIGGER lll INFECTONATOR
SANTA KILLER
I only missed Mad Scientist by one more attack and was on level 18 so I didn't get Zombie XMAS on first try. Tempting to try agian
Under rating threshold (hideshow)
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaawwwwwwwwwwwwwwwwwwwwwssssssssssssssssssssssssssssooooooooooooooooommmmmmmmmmmmmmmmmeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Under rating threshold (hideshow)
Not bad, but could be better. A more friendly GUI and user interface might help - being able to see what the values for previous values can help cost/benefit analysis.