Here is the full list of all 60 TOXIKK achievements.
20000
10000 Kills
Rank 16/16
5000 Kills
Rank 15/16
Rank 14/16
Rank 13/16
Rank 12/16
Rank 11/16
1000 Kills
Rank 10/16
Rank 09/16
500 Kills
Rank 08/16
Rank 07/16
Mission 12
All contracts completed
Mission 11
Mission 10
Rank 06/16
Mission 09
100 Kills
Mission 08
Mission 07
Mission 06
50 Kills
Rank 05/16
Mission 05
-
Mission 04
Rank 04/16
Mission 03
Mission 02
Rank 03/16
Rank 02/16
Mission 01
FIRST IMPACT
Complete without using a vehicle
Rank 01/16