The Chem Trooper was introduced in the 2.0 Patch along with other Poison-based units. At Rank 1, this unit has 210. Equipped with a Chemical Sprayer, the Chem Trooper attacks by dousing the 3 spaces in a row directly in front of it; dealing 45-75 damage (at Rank 1). Like most other chemical/poison-based attacks, its high damage will melt both troops and tanks along with its lethal Poison DoT () effect, which lasts for 3 turns unless the target(s) is/are immune to Poison.
However, the player should be very wary about deploying these troopers on the front-line due to their lack of Armor - their healing cost includes rare Chemical Vials. However, when used in PvP, this unit enters a two hour cooldown instead of going to the Hospital, so there is no Chemical Vial cost. Thus, it can see much more use in PvP.