Here are the top 100 arranged by kills per root game.

KPRG Player
14.04 shoopaloop
12.02 Fatman_x
11.80 avesano
11.64 LaughJoeyLaugh
11.51 Rafkrik
10.58 pipacs
10.23 22 Apr
10.09 gogi
9.82 dirtytrolls
9.73 "MC"
9.50 hcdug
9.48 Oliversdad
9.42 pHaNToM-R
9.38 NikkeKnatterton
9.11 arkenkor
8.99 michele
8.78 _Kdice Boss_
8.29 Mairixs
7.91 IFIGENIUS
7.78 Rastaa Man :)
7.55 Created
7.52 MNML
7.42 Mr Me
7.35 gontis
7.11 Captain Ramius
6.93 DivideAndConquer
6.88 Nerd Alert
6.81 tyla
6.62 moulue
6.57 integral
6.47 michl
6.39 longpube
6.23 greeen
6.11 dr. zoidberg 69
6.09 Fullmetal
6.01 THRILLHO
5.92 rofarah
5.91 Caephus
5.91 MATYLF
5.89 seeb
5.86 Qaziyev
5.75 lipos
5.67 Bendiko
5.62 silapuuce
5.50 sweet girl
5.45 integraI
5.40 DonCapuco
5.37 ugolino
5.36 LUX88
5.28 EvAngelion27
5.22 Puvis
5.19 Capt Smashy
5.18 ireneo
4.88 deadcode
4.84 Jund
4.70 DiceMan3000
4.66 procutter
4.59 Aken
4.55 Baz_Eagles
4.55 twiga
4.24 Grux
4.24 Honyo
4.23 niczrobo
4.07 Skerdikas
3.96 FortSomFan
3.95 ilphae
3.92 ToNkO
3.92 spman
3.77 Kingofskillz
3.74 benjamin barker
3.73 spman3
3.69 Juppi137
3.68 kdiceplaya!
3.65 Sensei_Mata
3.59 burcin
3.57 Slinus
3.56 spman2
3.44 Rileyhemp
3.43 PRESIDENT N° 1
3.39 ehervey
3.36 Loobee
3.21 Chris is King1
3.20 spman4
3.16 S3Z0
3.15 Mitsi the cat
3.02 ChiefWeeze
2.92 Soromon
2.83 saulens
2.74 Alphax
2.65 montecarlo
2.57 Arnas Bro
2.27 mattz1
2.24 happytoscrap
2.19 lerch
2.01 Imganja
1.87 Beer Me!
1.06 franklyghost
1.00 jurgen
0.39 BamaNation
0.00 gtzlat