Laser Spammer Achievment - What am I doing wrong?

[Adam Over]

I been trying to get this for ages. I am using only the laser turret, and the stomp commander ability to down the flying enemies. But the achievment wont drop.

Can anyone tell me what I am doing wrong.

I am not using any other ability, no sentinel weapons, not harvesting or other drones. No path 'gloop / fire / bomb etc'.

The only thing other than the tower is the stomp (which is the only way i can kill the flying enemies).

The commander is at level 19, and guns maxed out.

[pluto78]

Hi! You need to use not the turret laser. The sentinel section has a laser too. Just that and the healing.